switch...case

Description

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.

Syntax

1switch (var) {
2      case label1:
3        // statements
4        break;
5      case label2:
6        // statements
7        break;
8      default:
9        // statements
10        break;
11    }

Parameters

var

byte

char

int

long

label1

label2

*You can also use the

bool

Note that you can also use negative values as input.

Returns

Nothing

Example Code

1switch (var) {
2      case 1:
3        // do something when var equals 1
4        break;
5      case 2:
6        // do something when var equals 2
7        break;
8      default:
9        // if nothing else matches, do the default
10        // default is optional
11        break;
12    }

See also

• break
• continue
• do...while
• else
• for
• goto
• if
• return
• while