Use the switch statement to select one of many blocks of code to be executed.
execute code block 1
execute code block 2
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.
//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();
document.write("I'm looking forward to this weekend!");