return

Terminate a function and return a value from a function to the calling function, if desired.

Syntax


return;
return value; // both forms are valid

Parameters

value: any variable or constant type

Example

A function to compare a sensor input to a threshold

int checkSensor(){
    if (analogRead(0) > 400) {
        return 1;
    else{
        return 0;
    }
}

The return keyword is handy to test a section of code without having to “comment out” large sections of possibly buggy code.

void loop(){

  // brilliant code idea to test here

  return;

  // the rest of a dysfunctional sketch here
  // this code will never be executed
}

See also

comments


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The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.