Asked By
jones
10 points
N/A
Posted on - 04/01/2012
What is the function of "switch()" in JavaScript and where i can place it in Html document?
Function of “switch()” in JavaScript
Hi there
I Think you need help regarding the switch() statement in JavaScript.
Java provides a several branch variety statement known as switch. This selection statement checks the significance of an expression against a list of integer or char constants. When a match is found , the statements associated with that constant are executed.
The syntax of the switch statement is as follows : –
switch(expression)
{
case constant1 : statement sequence 1 ;
break;
case constant2 : statement sequence 2 ;
break;
case constant3 : statement sequence 3 ;
break;
default : statement sequence when provided input is not in any of the above cases ;
}
Use break statement or also you will have a situation called fall through , Its the fall of control to the following case of the matching case.
Good luck.
Function of “switch()” in JavaScript
The switch statement is used in JavaScript to make different action according to different conditions. It is used to execute different events or tasks based on the source value.
Here is the proper syntax for the switch statement:
switch(n)
{
case 1:
first block to execute
break;
case 2:
second block to execute
break;
default:
block to execute if n doesn’t match with case 1 and case 2
}
At the start, the set will have an expression n that needs to be evaluated once. The value of n will then be compared with the value in every case. If it matches with one of the cases, the block of codes under it will be executed. Inserting break; after each condition avoids the code from going over to the next case.
To better understand it and maybe learn some other JavaScript statements, you may visit JavaScript Switch Statement.
