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arduino:control_structures:return [2024/02/16 01:04] (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; // both forms are valid | ||
+ | |||
+ | ==== Parameters ==== | ||
+ | |||
+ | value: any variable or constant type | ||
+ | |||
+ | ==== Examples: ==== | ||
+ | |||
+ | A function to compare a sensor input to a threshold | ||
+ | <code arduino> 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 arduino>void loop(){ | ||
+ | |||
+ | // brilliant code idea to test here | ||
+ | |||
+ | return; | ||
+ | |||
+ | // the rest of a dysfunctional sketch here | ||
+ | // this code will never be executed | ||
+ | }</code> | ||
+ | |||
+ | |||
+ | ==== See also ==== | ||
+ | |||
+ | [[Comments | comments ]] | ||
+ | |||
+ | |||
+ | Source: arduino.cc | ||