Reference for Processing version 1.2. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.

Name

switch()

Examples
int num = 1;

switch(num) {
  case 0: 
    println("Zero");  // Does not execute
    break;
  case 1: 
    println("One");  // Prints "One"
    break;
}

char letter = 'N';

switch(letter) {
  case 'A': 
    println("Alpha");  // Does not execute
    break;
  case 'B': 
    println("Bravo");  // Does not execute
    break;
  default:             // Default executes if the case labels
    println("None");   // don't match the switch parameter
    break;
}

// Removing a "break" enables testing
// for more than one value at once

char letter = 'b';

switch(letter) {
  case 'a':
  case 'A': 
    println("Alpha");  // Does not execute
    break;
  case 'b':
  case 'B': 
    println("Bravo");  // Prints "Bravo"
    break;
}
Description Works like an if else structure, but switch() is more convenient when you need to select between three or more alternatives. Program controls jumps to the case with the same value as the expression. All remaining statements in the switch are executed unless redirected by a break. Only primitive datatypes which can convert to an integer (byte, char, and int) may be used as the expression parameter. The default is optional.
Syntax
switch(expression)
{
  case label: 
     statements          
  case label:          // Optional
     statements        // "
  default:             // "
     statements        // "
}
Parameters
expression byte, char, or int
label byte, char, or int
statements one or more statements to be executed
Usage Web & Application
Related case
default
break
if()
else
Updated on June 14, 2010 12:05:29pm EDT

Creative Commons License