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int val = 30;
 
void draw() {
  int t = timestwo(val);
  println(t);
}

int timestwo(int doubledVal) {
  doubledVal = doubledVal * 2;
  return doubledVal;
}


int[] vals = {10, 20, 30};
  
void draw() {
  int[] t = timestwo(vals);
  println(t);
}

int[] timestwo(int[] doubledVals) {
  for(int i=0; i<b.length; i++) {
    b[i] = b[i] * 2;
  }
  return doubledVals;
}

Keyword used to indicate the value to return from a function. The value being returned must be the same datatype as defined in the function declaration. Functions declared with void can't return values and shouldn't include a return value. Functions can't include more than one return and the statement including return must be the last line in the function. type function { statements return value } type boolean, byte, char, int, float, String, boolean[], byte[], char[], int[], float[], String[] function any function that is being defined statements any valid statements value must be the same datatype as the type parameter 1.0 Keyword PDE