本文档介绍了基本的数学运算,包括加法、减法、乘法、除法、设置和转换数字、查找余数、最小值和最大值、绝对值、平方根、近似值以及生成随机值。
将两个值相加/相乘
0 + 0
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_arithmetic\"><field name=\"OP\">ADD</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
这用于返回两个数字的总和。
参数: 条件:
- 数字(预设值:0)
- 运算符:+(默认)/-/×/÷/**
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>count</variable><variable>add</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">count</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">3</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">add</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">ADD</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">count</field></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">2</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">add</field></block></value></block></value></block></value></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
将两个数字除以
0 ÷ 0
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_arithmetic\"><field name=\"OP\">DIVIDE</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于返回两个数字之间的商。
参数: 条件:
- 数字(预设值:0)
- 运算符:+(默认)/-/×/÷/**
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>count</variable><variable>divide</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">count</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">3</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">divide</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_arithmetic\"><field name=\"OP\">DIVIDE</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">count</field></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">2</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">divide</field></block></value></block></value></block></value></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
当计数为 ÷ 2 时,输出:
当计数为**2时,输出:
设置数字
0
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_number\"><field name=\"NUM\">0</field></block></xml>"}
此块用于将值设置为数字或十进制数。
参数: 条件:数字(默认值:0)
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>count</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">count</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">6.1</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">count</field></block></value></block></value></block></value></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
显示两个数字之间的余数
提醒 0 ÷ 1
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_modulo\"><value name=\"DIVIDEND\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"DIVISOR\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></xml>"}
此块用于显示两个值之间的余数。
参数: 条件:数字(默认值:0)
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>count</variable><variable>remainder</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">count</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">3</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">remainder</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_modulo\"><value name=\"DIVIDEND\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">count</field></block></value><value name=\"DIVISOR\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">remainder</field></block></value></block></value></block></value></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
查找最小值
最小值为 0 和 0
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_op2\"><field name=\"op\">min</field><value name=\"x\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"y\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
“最小值 0 和 0”块用于提取两个数字之间的较小一个。
参数: 条件:数字(默认值:0)
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>count</variable><variable>minimum</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">count</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">3</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">minimum</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_op2\"><field name=\"op\">min</field><value name=\"x\"><block type=\"variables_get\"><field name=\"VAR\">count</field></block></value><value name=\"y\"><shadow type=\"math_number\"><field name=\"NUM\">4</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">minimum</field></block></value></block></value></block></value></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
查找最大值
最大值 0 和 0
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_op2\"><field name=\"op\">max</field><value name=\"x\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"y\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于在两个数字之间取较大的值。
参数: 条件:数字(默认值:0)
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>count</variable><variable>maximum</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">count</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">3.568</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">maximum</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_op2\"><field name=\"op\">max</field><value name=\"x\"><block type=\"variables_get\"><field name=\"VAR\">count</field></block></value><value name=\"y\"><shadow type=\"math_number\"><field name=\"NUM\">4</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">maximum</field></block></value></block></value></block></value></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
将数字更改为绝对值
0 的绝对值
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_op3\"><value name=\"x\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于将数字的值转换为绝对值。
参数: 条件:数字(默认值:0)
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>absolute</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">absolute</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_op3\"><value name=\"x\"><shadow type=\"math_number\"><field name=\"NUM\">-10</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">absolute</field></block></value></block></value></block></value></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
取平方根
平方根
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_js_op\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" op-type=\"unary\"></mutation><field name=\"OP\">sqrt</field><value name=\"ARG0\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于取值的平方根。
参数: 条件:
- 数字(预设值:0)
- 平方根 (预设)/sin/cos/tan/atan2/整数除/整数乘
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>value</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">value</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_js_op\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" op-type=\"unary\"></mutation><field name=\"OP\">sqrt</field><value name=\"ARG0\"><shadow type=\"math_number\"><field name=\"NUM\">144</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">value</field></block></value></block></value></block></value></block></next></block></next></block></next></block></statement></block></xml>"}
当它设置为平方根 144 时,输出:
当它设置为 sin 144 时,输出:
当它设置为 cos 144 时,输出:
当它设置为 tan 144 时,输出:
当它设置为 atan2 144 0 时,输出:
当它设置为 144 整数÷ 5 时,输出:
当它设置为 144 整数× 5 时,输出:
将数字转换为近似值
圆
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"math_js_round\"><field name=\"OP\">round</field><value name=\"ARG0\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}
此块用于将数字替换为近似值。 如果小数部分超过二分之一,则该数字将增加。
参数: 条件:
- 数字(预设值:0)
- 圆形(默认)/天花板/地板/截断
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>value</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">value</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"math_js_round\"><field name=\"OP\">round</field><value name=\"ARG0\"><shadow type=\"math_number\"><field name=\"NUM\">5.11</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">value</field></block></value></block></value></block></value></block></next></block></next></block></next></block></statement></block></xml>"}
当它设置为四舍五入 5.11 时,输出:
当它设置为上限 5.11 时,输出:
当它设置为下限 5.99 时,输出:
当它设置为截断 5.99 时,输出:
选择随机值
随机选择 0 到 10
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"device_random\"><value name=\"min\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"limit\"><shadow type=\"math_number\"><field name=\"NUM\">10</field></shadow></value></block></xml>"}
此块用于在范围之间选择随机数。
参数: 条件:数字(默认值:0 和 10)
输出: 数
示例代码:
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>value</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">value</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"device_random\"><value name=\"min\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value><value name=\"limit\"><shadow type=\"math_number\"><field name=\"NUM\">10</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">value</field></block></value></block></value></block></value></block></next></block></next></block></next></block></statement></block></xml>"}
输出:
目录