Week 4.2

What is the syntax of a for loop in JavaScript?

• for (initialization; condition; increment/decrement) { // Block of Code }

• for { // Block of Code } (initialization; condition; increment/decrement)

• for [initialization; condition; increment/decrement] { // Block of Code }

• for (condition; initialization; increment/decrement) { // Block of Code }

What is the purpose of a for loop?

• To execute a block of code repeatedly while a condition is true

• To execute a block of code repeatedly until a condition is true

• To execute a block of code once

• To execute a block of code randomly

What is the difference between i++ and ++i in a for loop?

• There is no difference

• i++ increments i after the expression is evaluated, while ++i increments i before the expression is evaluated

• i++ increments i by 2, while ++i increments i by 1

• i++ decrements i, while ++i increments i

What is the output of the following code?

for (let i = 0; i < 5; i++) { console.log(i); }

• 0 1 2 3 4

• 1 2 3 4 5

• 0 1 2 3 4 5

Which of the following statements is true about a nested for loop in JavaScript?

• It is a loop inside another loop.

• It can only iterate over arrays.

• It can only iterate over objects.

What is the output of the following code?

for (var i = 1; i <= 10; i++) {

if (i == 3) { document.write("*");}

}

• *

• *****

• **********

What is the output of the following code?

for (var i = 3; i >= 1; i--) {

for (var j = 1; j <= i; j++) {document.write("*"); }

document.write("<br>"); }

• *

• ***

  ***

  ***

• *

  **

  ***

• ***

  **

  *

Which one of the following options is NOT a valid logical operator?

• ==

• =

• &&

• !=

What is the purpose of a loop in flow control?

• to execute a block of code only if a certain condition is met

• to sort an array of elements

• to define a function

• to execute a block of code repeatedly

Which of the following statements is true about if-else statements?

• They can only be used to execute code once

• They allow for branching logic based on whether a condition is true or false

• They are only used in loops

• They are interchangeable with switch statements