Description

By using the if instruction, the Arduino will check whether a certain condition is met, and then execute the corresponding program if the result is ‘true’.

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Syntax

if (condition) {
//statement(s)
}

condition: a boolean expression (i.e., can be true or false).

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Example code

if( a == 0 )

{

digitalWrite(LEDpin, HIGH);    //if the value of parameter a is 0, turn the LED on.

}

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