JavaScript Switch Statement

From http://www.w3schools.com (Copyright Refsnes Data)

# JavaScript Switch Statement

Conditional statements in JavaScript are used to perform different actions based on different conditions.

## Examples

Switch statement
How to write a switch statement.

## The JavaScript Switch Statement

You should use the switch statement if you want to select one of many blocks of code to be executed.

### Syntax

    switch(n)
    {
    case 1:
      execute code block 1
      break;
    case 2:
      execute code block 2
      break;
    default:
      code to be executed if n is
      different from case 1 and 2
    }

This is how it works: First we have a single expression n (most often a variable), that is evaluated once. The value of the expression is then compared with the values for each case in the structure. If there is a match, the block of code associated with that case is executed. Use break to prevent the code from running into the next case automatically.

### Example

    <script type="text/javascript">
    //You will receive a different greeting based
    //on what day it is. Note that Sunday=0,
    //Monday=1, Tuesday=2, etc.

    var d=new Date();
    theDay=d.getDay();
    switch (theDay)
    {
    case 5:
      document.write("Finally Friday");
      break;
    case 6:
      document.write("Super Saturday");
      break;
    case 0:
      document.write("Sleepy Sunday");
      break;
    default:
      document.write("I'm looking forward to this weekend!");
    }
    </script>

From http://www.w3schools.com (Copyright Refsnes Data)