JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - Introduction to the For Loop - I

This video tutorial introduces the concept of loops in JavaScript, explaining their importance and functionality. It covers the basics of what loops do, how they execute code multiple times, and their practical applications, especially with arrays. The tutorial provides a step-by-step guide on writing a for loop, detailing the syntax and expressions involved. It emphasizes the significance of loops in programming and offers practical examples to help learners understand and apply loops effectively.

What is the primary purpose of loops in programming?

• To execute a block of code conditionally

• To execute a block of code in reverse

• To execute a block of code multiple times

• To execute a block of code once

How can loops be particularly useful when working with arrays?

• They allow you to sort arrays automatically

• They enable you to count elements without manual counting

• They can change the data type of array elements

• They can delete elements from arrays

What is the first expression in a for loop used for?

• To initialize the loop counter

• To increment the loop counter

• To check the condition

• To terminate the loop

Which keyword is used to start a for loop in JavaScript?

• while

• for

• iterate

• loop

What does the second expression in a for loop specify?

• The starting value of the loop counter

• The condition for the loop to continue

• The increment of the loop counter

• The decrement of the loop counter

What is the role of the third expression in a for loop?

• To terminate the loop

• To initialize the loop counter

• To check the loop condition

• To update the loop counter after each iteration

In a for loop, what is a common variable name used for the loop counter?

• counter

• index

• loopVar

• i