JavaScript Loop Mastery

What is the syntax for a for loop in JavaScript?

• for (increment/decrement; condition; initialization) { // code to be executed }

• for (initialization; condition; increment/decrement) { // code to be executed }

• for (initialization; increment/decrement; condition) { // code to be executed }

• for (condition; initialization; increment/decrement) { // code to be executed }

How is a while loop different from a for loop?

• A while loop continues to execute as long as the specified condition is true, whereas a for loop executes a specified number of times.

• A while loop and a for loop are essentially the same and can be used interchangeably.

• A while loop can only be used for numeric iterations, whereas a for loop can be used for any type of iteration.

• A while loop executes a specified number of times, whereas a for loop continues to execute as long as the specified condition is true.

When would you use a do-while loop instead of a while loop?

• Use a do-while loop when you want the loop to execute after checking the condition

• Use a do-while loop when you want the loop to execute only if the condition is true

• Use a do-while loop when you want the loop to execute at least once before checking the condition.

• Use a do-while loop when you want to avoid infinite loops

Explain the concept of nested loops in JavaScript with an example.

• Example: for (let i = 0; i < 3; i++) { for (let j = 0; j < 1; j++) { console.log('i:', i, 'j:', j); } }

• Example: for (let i = 0; i < 2; i++) { for (let j = 0; j < 3; j++) { console.log('i:', i, 'j:', j); } }

• Example: for (let i = 0; i < 3; i++) { for (let j = 0; j < 3; j++) { console.log('i:', i, 'j:', j); } }

• Example: for (let i = 0; i < 3; i++) { for (let j = 0; j < 2; j++) { console.log('i:', i, 'j:', j); } }

What are the loop control statements available in JavaScript?

• break, continue, return

• for, while, do-while

• if, else, switch

• try, catch, finally

What is the output of the following for loop: for(let i=0; i<5; i++){ console.log(i); }

• 6

• 0 1 2 3 4

• 5

• 7

Write a while loop that prints numbers from 1 to 10.

• let i = 1; while (i < 10) { console.log(i); i++; }

• let i = 1; while (i <= 10) { console.log(i); i++; }

• let i = 1; while (i <= 11) { console.log(i); i++; }

• let i = 10; while (i >= 1) { console.log(i); i--; }

In a nested loop, what does the outer loop control?

• The conditions for terminating the inner loop

• The number of iterations or repetitions of the inner loop

• The output of the inner loop

• The initialization of variables in the inner loop

How can you break out of a loop in JavaScript?

• Using the 'break' statement

• Using the 'exit' statement

• By deleting the loop

• Using the 'stop' statement

What is the purpose of the continue statement in a loop?

• To execute the loop only once

• To reverse the order of iterations

• To end the loop immediately

• To skip the current iteration of the loop and continue with the next iteration.