In JavaScript, loop control statements allow you to modify the execution of loops. There are three types of loop control statements in JavaScript: Example: for (let i = 1; i <= 10; i++) { if (i === 5) { break; } console.log(i); } // Output: 1 2 3 4 Example: for (let i = 1; …
Category: JavaScript
JavaScript for…in loop
The for…in loop is a JavaScript loop used to iterate over the properties of an object. It works by looping over all the enumerable properties of an object, including any properties inherited from its prototype chain. The syntax for the for…in loop is as follows: for (variable in object) { // code to be executed …
JavaScript For Loop
A for loop in JavaScript is a control flow statement that allows you to repeatedly execute a block of code a certain number of times. The syntax for a for loop is as follows: for (initialization; condition; increment/decrement) { // code to be executed } The initialization step initializes the loop variable before the loop …
JavaScript While Loops
JavaScript While loops are a type of loop statement that allows you to repeatedly execute a block of code as long as a specified condition is true. The syntax for a while loop is as follows: while (condition) { // code to be executed } Here, the condition is an expression that is evaluated before …
JavaScript Switch Case
JavaScript Switch Case is a control structure used to execute different code blocks based on the value of a given expression. The expression is evaluated and then compared with the cases defined within the switch statement. Here is the basic syntax of the JavaScript Switch Case statement: switch(expression) { case value1: // code block to …
JavaScript if…else Statement
The if…else statement in JavaScript is a conditional statement that allows you to execute different blocks of code based on whether a certain condition is true or false. Here’s the basic syntax: if (condition) { // code to execute if condition is true } else { // code to execute if condition is false } …
JavaScript Operators
JavaScript operators are symbols or keywords used to perform operations on variables, values, and expressions. Here are some of the commonly used JavaScript operators: These are some of the most commonly used operators in JavaScript.
JavaScript Variables
In JavaScript, variables are used to store data values that can be referenced and manipulated throughout your code. To create a variable in JavaScript, you use the var, let, or const keyword, followed by the variable name, and optionally a value assignment. Here are the three different ways to create variables in JavaScript: Example: var …
JavaScript Placement in HTML File
JavaScript can be placed in an HTML file in several ways: It is generally recommended to place JavaScript code at the bottom of the <body> section to improve the page’s loading speed. However, the exact placement of the script depends on the specific needs and requirements of the web page.
Enabling JavaScript in Browsers
Enabling JavaScript depends on which browser you are using. Here are the general steps for enabling JavaScript in some popular browsers: Google Chrome: Mozilla Firefox: Apple Safari: Microsoft Edge: Once you have enabled JavaScript, you should be able to use websites that require it.