JavaScript Statements Mocktest

The statement let name = "John"; is used to declare a variable named name and assign the value "John" to it. This allows you to store and manipulate the value "John" in your JavaScript code.

The conditional statement, also known as the if statement, is used to execute different code blocks based on a specified condition. It allows you to control the flow of your code by checking whether a condition is true or false.

The output will be "x is greater than 10" because the condition x > 10 is true, so the code inside the if block will execute, printing "x is greater than 10" to the console.

The code snippet uses a while loop to execute a block of code repeatedly until the condition num > 0 becomes false. It starts with num being 5 and prints the value of num to the console in each iteration, then decrements num by 1. This process continues until num becomes 0, at which point the loop stops. Therefore, the output will be: 5 4 3 2 1

The code snippet uses a for loop to iterate from 0 to 3 (inclusive) and prints the value of i to the console in each iteration. Therefore, the output will be: 0 1 2 3

The code snippet calculates the sum of all numbers in the array numbers using a for...of loop. It iterates through each element in the array numbers and adds the current element to the variable sum. After iterating through all elements, it logs the value of sum to the console, which will be the sum of elements 1 + 2 + 3 + 4 + 5 = 15. Therefore, the output of the code is 15.

The statement uses the ternary conditional operator (? :) to assign the value "Positive" to result if the condition x > 0 is true, and "Non-positive" if the condition is false. This is a concise way of expressing conditional assignment in JavaScript.

The code snippet uses a do...while loop to execute a block of code at least once and then repeatedly as long as the condition count < 3 is true. It starts with count being 0 and prints the value of count to the console in each iteration, then increments count by 1. This process continues until count is no longer less than 3, at which point the loop stops. Therefore, the output will be: 0 1 2

The break; statement is used to exit the current loop or switch statement. When encountered, it immediately terminates the loop or switch block, and the program continues with the next statement after the loop or switch.

The while loop in JavaScript is used to execute a block of code repeatedly as long as a specified condition remains true. It evaluates the condition before each iteration, and if the condition is true, it executes the block of code inside the loop. If the condition becomes false at any point, the loop stops executing.