Example
If you have a function declared you can call it anywhere else in the code. Here is an example of calling a function:
void setup(){
Serial.begin(9600);
}
void loop() {
int i = 2;
int k = squareNum(i); // k now contains 4
Serial.println(k);
delay(500);
}
int squareNum(int a) {
return a*a;
}
