JavaScript While LOOP tutorial

The loop in JavaScript is used to specify the number of times the same code is executed (or when the specified condition is true ).
JavaScript Switch Declaration
If you want to execute one of several code blocks, you can use the switch statement:
Syntax:
Copy codeThe Code is as follows:
Switch (n)
{
Case 1:
Execution Code Block 1
Break
Case 2:
Execution Code Block 2
Break
Default:
If n is neither 1 nor 2, execute this code
}

Working principle: the (n) behind the switch can be an expression or (and usually) a variable. Then, the value in the expression is compared with the number in case. If it matches a case, the subsequent code is executed. Break is used to prevent the code from being automatically executed to the next line.
Instance:

[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]