Arduino

Reference Language | Libraries | Comparison | Changes

## switch / case statements

Like if statements, switch...case controls the flow of programs by allowing programmers to specify different code that should be executed in various conditions. In particular, a switch statement compares the value of a variable to the values specified in case statements. When a case statement is found whose value matches that of the variable, the code in that case statement is run.

The break keyword exits the switch statement, and is typically used at the end of each case. Without a break statement, the switch statement will continue executing the following expressions ("falling-through") until a break, or the end of the switch statement is reached.

### Example

      switch (var) {
        case 1:
          //do something when var equals 1
          break;
        case 2:
          //do something when var equals 2
          break;
        default:
          // if nothing else matches, do the default
          // default is optional
      }

### Syntax

    switch (var) {
      case label:
        // statements
        break;
      case label:
        // statements
        break;
      default:
        // statements
    }

### Parameters

var: the variable whose value to compare to the various cases

label: a value to compare the variable to

#### See also:

if...else Reference Home

Corrections, suggestions, and new documentation should be posted to the Forum.

The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.

### Share

### This link has expired.
Please re-subscribe to our Newsletters.

### Subscribe to our Newsletters

Email

Please enter a valid email to subscribe

Arduino Newsletter
Arduino Store Newsletter

### Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy

###### Newsletter

- ©2015 Arduino
- Copyright Notice
- Contact us
- Careers