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.. _arduino-switchcase:
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 <http://arduino.cc/en/Reference/Else>`_
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