Index
 
  Reference for Wiring 1.0 (ALPHA) 0021+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.
Name  

switch()

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


char letter = 'N'; 
 
switch(letter) { 
  case 'A': 
    Serial.println("Alpha");  // Does not execute 
    break; 
  case 'B': 
    Serial.println("Bravo");  // Does not execute 
    break; 
  default:             // Default executes if the case labels 
    Serial.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': 
    Serial.println("Alpha");  // Does not execute 
    break; 
  case 'b': 
  case 'B': 
    Serial.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