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Defining new functions in Arduino
Defining new functions in Arduino is equivalent to defining the functions in C.
The syntax is −
Syntax
return_type function_name(arg_type arg)
The only difference is that in C, the function needs to be declared at the top, if it is invoked before its definition. No such constraint exists in Arduino. The following code demonstrates this −
Example
void setup() {
Serial.begin(9600);
Serial.println();
}
void loop() {
// put your main code here, to run repeatedly:
for (int i = 0; i < 10; i++) {
long int w = square(i);
Serial.println(w);
delay(1000);
}
}
long int square(int a) {
return (a * a);
}The Serial Monitor output is shown below −
Output
As you can see, even though the function was invoked before being defined, Arduino did not throw up an error. The execution worked just as expected.
Updated on: 24-Mar-2021
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