GeezerVison

return

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.

The keyword return may also be used to break out of a function, thus not allowing the program to the remaining statements. (See the third example above.)

• int[] vals = {10, 20, 30}; 
    
  void draw() { 
    int[] t = timestwo(vals); 
    println(t); 
    noLoop();
  } 
   
  int[] timestwo(int[] dVals) { 
    for (int i = 0; i < dVals.length; i++) { 
      dVals[i] = dVals[i] * 2; 
    } 
    return dVals;  // Returns an array of 3 ints: 20, 40, 60 
  }
  

• void draw() {
    background(204);
    line(0, 0, width, height);
    if (mousePressed) {
      return;  // Break out of draw(), skipping the line statement below
    }
    line(0, height, width, 0);  // Executed only if mouse is not pressed
  }
  

• int val = 30;
   
  void draw() {
    int t = timestwo(val);
    println(t);
  }
  
  // The first 'int' in the function declaration
  // specifies the type of data to be returned.
  int timestwo(int dVal) {
    dVal = dVal * 2;
    return dVal;  // Returns an int of 60, in this case
  }
  

• type function {
• statements
• return value
• }

• typeboolean, byte, char, int, float, String, boolean[], byte[], char[], int[], float[], or String[]
• functionthe function that is being defined
• statementsany valid statements
• valuemust be the same datatype as the "type" parameter