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en:reference:language:return

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en:reference:language:return [2017/04/07 10:03] (current)
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 +====== return ======
 +
 +
 +Terminate a function and return a value from a function to the calling function, if desired.
 +
 +
 +===== Syntax: =====
 +
 +return;
 +return value; <​nowiki>//​ both forms are valid</​nowiki>​
 +
 +
 +===== Parameters =====
 +
 +value: any variable or constant type
 +
 +===== Examples: =====
 +
 +A function to compare a sensor input to a threshold
 +
 +
 +<code cpp>
 + int checkSensor(){ ​      
 +    if (analogRead(0) > 400) {
 +        return 1;
 +    else{
 +        return 0;
 +    }
 +}
 +</​code>​
 +
 +The return keyword is handy to test a section of code without having to "​comment out" large sections of possibly buggy code.
 +<code cpp>
 +void loop(){
 +
 +// brilliant code idea to test here
 +
 +return;
 +
 +// the rest of a dysfunctional sketch here
 +// this code will never be executed
 +}
 +</​code>​
 +
  
en/reference/language/return.txt · Last modified: 2017/04/07 10:03 (external edit)