Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Javascript Articles
Page 506 of 534
How do you reverse a string in place in JavaScript?
In this tutorial, we will learn to reverse a string in place in JavaScript. How to reverse a string is one of the most popular questions asked in the interview of freshers. It's an easy task but the interviewer can be tricky and make the same question difficult for you. For example, what if the interviewer asks you to write a pseudo code to reverse a string in place without using the extra space? You should have an answer ready in your mind for this kind of tricky question. There are lots of ways to reverse a string. As ...
Read MoreHow to show a while loop using a flow chart in JavaScript?
The purpose of a while loop is to execute a statement or code block repeatedly as long as an expression is true. Once the expression becomes false, the loop terminates. Let's see how to show while loop using flowchart in JavaScript. While Loop Flowchart The flowchart below illustrates the execution flow of a while loop: START ...
Read MoreHow to show for loop using a flowchart in JavaScript?
The "for" loop includes loop initialization where we initialize our counter to a starting value. The initialization statement is executed before the loop begins, the test statement which will test if a given condition is true or not. If the condition is true, then the code given inside the loop will be executed, otherwise, the control will come out of the loop. At the end comes the iteration statement where you can increase or decrease your counter. Let us see how to show for loop using flowchart in JavaScript: For Loop Flowchart ...
Read MoreWhat is an alert box in JavaScript?
An alert dialog box is mostly used to give a warning message to the users. For example, if one input field requires to enter some text but the user does not provide any input, then as a part of validation, you can use an alert box to give a warning message. Nonetheless, an alert box can still be used for friendlier messages. Alert box gives only one button "OK" to select and proceed. Syntax alert(message); Parameters: message - The text to display in the alert dialog box Example ...
Read MoreHow to use window.location to redirect to a different URL with JavaScript?
You might have encountered a situation where you clicked a URL to reach a page X but internally you were directed to another page Y. This happens due to page redirection. JavaScript provides several methods to redirect users to different URLs using the window.location object. This is useful for creating dynamic navigation, handling authentication, or redirecting after form submissions. Common Redirect Methods There are three main ways to redirect using window.location: Method Description Back Button Behavior ...
Read MoreWhat are label statements in JavaScript?
JavaScript label statements are used to prefix a label to an identifier. A label can be used with break and continue statements to control the flow more precisely. A label is simply an identifier followed by a colon (:) that is applied to a statement or a block of code. Syntax labelName: statement Where labelName is any valid JavaScript identifier, and statement can be any JavaScript statement, typically a loop. Using Labels with break Statement Labels allow you to break out of nested loops by specifying which loop to exit: ...
Read MoreWhy doesn't JavaScript have a goto statement?
JavaScript does not have a goto statement, despite "goto" being a reserved keyword. The language was designed without goto to encourage structured programming and avoid the problems associated with "spaghetti code". Why goto is Reserved but Not Implemented JavaScript reserves the goto keyword for potential future use, but it has never been implemented. This design decision promotes cleaner, more maintainable code by forcing developers to use structured control flow statements like loops and functions. Problems with goto Statements The goto statement can create several issues: Spaghetti code: Jumps make code flow difficult to follow ...
Read MoreHow to use labels to control the Flow in JavaScript?
In JavaScript, labels provide precise control over program flow when used with break and continue statements. A label is an identifier followed by a colon (:) that marks a statement or block of code, allowing you to break out of or continue specific loops in nested structures. Syntax labelName: statement Labels are commonly used with nested loops where you need to control which loop to break from or continue. Using Labels with break Statement The break statement with a label allows you to exit a specific loop, not just the innermost one: ...
Read MoreHow can I use goto statement in JavaScript?
JavaScript does not have a native goto statement. While goto is a reserved keyword, it cannot be used in standard JavaScript code. However, you can achieve similar control flow using labels with break and continue statements. Why goto Doesn't Exist in JavaScript The goto statement was intentionally excluded from JavaScript to promote structured programming and avoid "spaghetti code" that makes programs difficult to understand and maintain. Alternative: Using Labels with break and continue JavaScript provides labeled statements that work with break and continue for controlled jumps: let a = 0; beginning: while (true) ...
Read MoreHow to break a loop in JavaScript?
The break statement is used to exit a loop immediately and continue executing the code after the loop. When a break is encountered, the loop terminates completely, unlike continue which only skips the current iteration. Syntax break; Breaking a for Loop The most common use of break is to exit a loop when a certain condition is met: var text = ""; ...
Read More