How to use Loops in Javascript

Hi Guys,
If you want to run the same code over and over again, each time with a different value. Loops can execute a block of code a number of times.

There are mainly four types of loops in JavaScript.

• for : loops through a block of code a number of times
• while : loops through a block of code while a specified condition is true
• do/while : also loops through a block of code while a specified condition is true

Loops are useful when we have to execute the same lines of code repeatedly. For a specific number of times or as long as a specific condition is true

for loop

Syntax

	for(statement1; statement2; statment3)
	{
		lines of code to be executed
	}

Detail Description

• statement1: It is executed first even before executing the looping code. So, this statement is normally used to assign values to variables that will be used inside the loop.






• statement2: It is the condition to execute the loop.
• statement3:It is executed every time after the looping code is executed.

while loop

The “while loop” is executed as long as the specified condition is true.

Syntax

	while(condition)
	{
		lines of code to be executed
	}

do…while loop

The do…while loop is very similar to while loop.

Syntax

	do
	{
		block of code to be executed
	}
	while (condition)

If anyone has doubts on this topic then please do let me know by leaving comments or send me an email.