Loops in JavaScript

Moving ahead, in this module, we'll be discussing about the loops in JavaScript. Loops in any programming language are used to execute repeated block of codes(which is called as iteration). It is implemented to repeat a certain set of instructions unless the condition is satisfied.

Loops can iterate over a range of values, arrays, or objects and execute a block of code for each iteration. The basic idea is to automate repetitive tasks. JavaScript supports all loops in programming. If you want to print a statement multiple times, loops can be implemented there.

It consists of two primary components: the loop body and the loop control variable. The loop body is the block of code that gets executed repeatedly and the loop control variable is used to track the number of iterations. The loop control variable is updated each time the loop body is executed.

The best real-life example of loops are ATM machine where the machine processes transactions again and again until the customer asks it to stop. Let's read more about it by understanding its types, functions and examples.

There are six types of loops most commonly used in JavaScript -

1. for Loop
2. while Loop
3. do-while Loop
4. for…in Loop
5. for…of Loop
6. forEach Loop

Also, apart from these commonly used loops in JavaScript, we also have another types of loop which are based on functioning:

• Entry-controlled loop (where condition is tested before executing the statement). For and while are entry-controlled loop.
• Exit-controlled loop (where statement is executed at the initial stage then checks the condition). Do-while loop is exit-controlled loop.