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Checking True or False and Do some Related Actions

If true then ... else ...

				
					{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>index</variable></variables><block type=\"controls_if\" disabled=\"true\" x=\"-428\" y=\"113\"><mutation else=\"1\"/><value name=\"IF0\"><shadow type=\"logic_boolean\" disabled=\"true\"><field name=\"BOOL\">TRUE</field></shadow></value></block></xml>"}
				
			

This block is used to check the value is true or false. If it is true, then do the first action. Otherwise, do the second action.

Parameters: Logic (Comparison)

Output: N/A
Sample code:

				
					{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>number</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">number</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">4</field></shadow></value><next><block type=\"controls_if\"><mutation else=\"1\"/><value name=\"IF0\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">TRUE</field></shadow><block type=\"logic_compare\"><field name=\"OP\">EQ</field><value name=\"A\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"variables_get\"><field name=\"VAR\">number</field></block></value><value name=\"B\"><shadow type=\"math_number\"><field name=\"NUM\">3</field></shadow></value></block></value><statement name=\"DO0\"><block type=\"basic_consoleLogText\"><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\">The number is same as 3.</field></shadow></value></block></statement><statement name=\"ELSE\"><block type=\"basic_consoleLogText\"><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\">The number is not same as 3.</field></shadow></value></block></statement></block></next></block></statement></block></xml>"}
				
			

The output:

If True Then Else - Output