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JavaScript else Statement

JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Website JS Syllabus JS Study Plan JS Interview Prep JS Bootcamp JS Certificate ... Use the else statement to specify a block of code to be executed if a condition is false.

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if...else - JavaScript - MDN Web Docs - Mozilla

May 4, 2026 - function checkValue(a, b) { if (a === 1) { if (b === 2) { console.log("a is 1 and b is 2"); } } else { console.log("a is not 1"); } } Do not confuse the primitive Boolean values true and false with truthiness or falsiness of the Boolean object. Any value that is not false, undefined, null, 0, -0, NaN, or the empty string (""), and any object, including a Boolean object whose value is false, is considered truthy when used as the condition. For example: js ·

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People also ask

What is a nested if statement in JavaScript?

A nested if statement refers to an if statement inside another statement. The nested statement allows you to test multiple criteria and increase the number of possible results.

wscubetech.com › resources › javascript › if-else

JavaScript if...else Statement: All Types With Examples

What are conditional statements in JavaScript?

Conditional statements in JavaScript control the flow of a program by deciding whether to execute a block of code. Common types include if, if…else, and if…else-if, which run code when conditions are true.

wscubetech.com › resources › javascript › if-else

JavaScript if...else Statement: All Types With Examples

What is an if…else statement in JavaScript?

The if…else statement in JavaScript is a conditional statement used to perform actions based on a condition. It decides which block of code to execute depending on whether the condition is true or false.

wscubetech.com › resources › javascript › if-else

JavaScript if...else Statement: All Types With Examples

w3schools.com › jsref › jsref_if.asp

JavaScript if/else Statement

cssText getPropertyPriority() getPropertyValue() item() length parentRule removeProperty() setProperty() JS Conversion ... let hour = new Date().getHours(); if (hour < 20) { document.getElementById("demo").innerHTML = "Good day"; } Try it Yourself » ... let hour = new Date().getHours(); if (hour < 20) { greeting = "Good day"; } else { greeting = "Good evening"; } Try it Yourself » · More examples below.

geeksforgeeks.org › javascript › javascript-if-else-else-if

JavaScript if, else and else if - GeeksforGeeks

April 15, 2025 - let temp = 30; if (temp >= 30) { console.log("It's hot outside."); } else if (temp >= 20) { console.log("It's warm outside."); } else if (temp >= 10) { console.log("It's cool outside."); } else { console.log("It's cold outside."); }

geraldclarkaudio.medium.com › javascript-if-else-else-if-statements-26d18456f304

JavaScript — If, Else, & Else If Statements | by Gerald Clark | Medium

May 23, 2024 - Here I’m checking if the password is greater than or equal to 12 characters long. If it is, I’ll print the password is strong…but as you can see, I have an else if statement below that and it is technically true too…

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JavaScript if...else Statement (with Examples)

In the above example, the program displays You passed the examination. if the score variable is equal to 50. Otherwise, it displays You failed the examination. In computer programming, the if...else statement is a conditional statement that executes a block of code only when a specific condition is met. For example,

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JavaScript If-Else and If-Then – JS Conditional Statements

August 9, 2021 - If you have a short if else statement, then you might choose to go with the ternary operator. The word ternary means something composed of three parts. ... The condition goes before the ? mark and if it is true, then the code between the ? mark and : would execute. If the condition is false, then the code after the : would execute. In this example, since age is greater than 18, then the message to the console would be "Can vote".

wscubetech.com › resources › javascript › if-else

JavaScript if...else Statement: All Types With Examples

October 29, 2025 - Learn all about JavaScript if...else statements with examples. Explore various types, syntax, and practical use cases in this comprehensive guide.

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JavaScript if/else Statement - Flexiple

If the initial if condition evaluates to false, the else if conditions are tested in the order they appear. If an else if condition evaluates to true, the corresponding block of code runs. Consider the following example, which checks the value of the variable grade and logs different messages based on its value:

stackoverflow.com › questions › 21525282 › for-else-loop-in-javascript

For else loop in Javascript? - Stack Overflow

Yes, it is possible to do this without a flag variable. You can emulate for … else statements using a label and a block:

function search(num) {
    find: {
        for (var i of [0,1,2,3,4]) {
            if (i===num) {
               console.log("Match found: "+ i);
               break find;
            }
        } // else part after the loop:
        console.log("No match found!");
    }
    // after loop and else
}

That said, I would recommend against doing this. It is a very unconvential way of writing this and will lead to poor understanding or confusion. An early return is acceptable though, and can be used in a helper function if you need to continue with execution after the loop.

Working example (you need to use the flag):

var search = function(num){
    var found = false;
    for(var i=0; i<5; i++){
        if(i===num){
            console.log("Match found: "+ i);
            found = true;
            break;
        }
    }
    if(!found){
        console.log("No match found!");
    }
};

tutorialspoint.com › javascript › javascript_ifelse.htm

JavaScript - if...else Statement

Try the following example to understand how the if statement works. <html> <body> <div id ='output'> </div> <script type = "text/javascript"> let result; let age = 20; if( age > 18 ) { result = "Qualifies for driving"; } document.getElementById("output").innerHTML = result; </script> <p> Set the variable to a different value and then try... </p> </body> </html> Qualifies for driving Set the variable to different value and then try... The 'if...else' statement is the next form of control statement that allows JavaScript to execute statements in a more controlled way.

techonthenet.com › js › if_else.php

JavaScript: if-else Statement

This JavaScript tutorial explains how to use the if-else statement with syntax and examples. In JavaScript, the if-else statement is used to execute code when a condition is TRUE, or execute different code if the condition evaluates to FALSE.

mimo.org › glossary › javascript › else-if

JavaScript else if statement: handle multiple conditions

For instance, modifying an HTML ... ... const time = new Date().getHours(); if (time < 12) { document.body.style.backgroundColor = "lightyellow"; } else if (time < 18) { document.body.style.backgroundColor = "lightblue"; } else { document.body.style.backgroundColor = "darkblue"; } You can also ...

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How to Use if…else Statements in JavaScript - Tabnine

July 25, 2024 - This example does not contain comparison operators, instead each expression is simply evaluated to be true or false due to the input data being Boolean. Currently the code above will print ‘Preparing cheese sandwich’ to the console because both sandwich and cheese are true. If the variable sandwich instead evaluates to false, the second else will come into play. This is the else for the first if statement.

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JavaScript else statement: Learn to control program flow

Object-oriented programming often involves constructors, which can include if / else for initializing object properties: ... class User { constructor(name) { this.name = name || "Guest"; // Default name if falsy } } const user1 = new User("Alice"); const user2 = new User(); console.log(user1.name); // Alice console.log(user2.name); // Guest · When working with JSON, we often need if / else to handle missing or incorrect data:

JavaScript Tutorial

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JavaScript if...else Statement

November 15, 2024 - In this example, the age is 16. Therefore, the expression age >= 18 evaluates to false. Hence, the statement in the else branch executes that output the message to the console.

developer.mozilla.org › en-US › docs › Learn_web_development › Core › Scripting › Conditionals

Making decisions in your code — conditionals - Learn web development | MDN

js · if (x === 5 || x === 7 || x === 10 || x === 20) { // run my code } if...else statements do the job of enabling conditional code well, but they are not without their downsides. They are mainly good for cases where you've got a couple of choices, and each one requires a reasonable amount ...

medium.com › @andrei_diaconu › it-beginner-series-javascript-if-else-exercises-cfc5d65b6f94

IT Beginner Series: JavaScript IF/ELSE Exercises (2) | by Andrei Diaconu | Medium

September 1, 2023 - Now, let’s jump into the exercises to gain hands-on experience with if/else statements. We'll provide a scenario, the code solution, and the expected output for each exercise.

javascript.com › learn › conditionals

JavaScript Conditionals: The Basics with Examples | JavaScript.com

You can extend an if statement ... doesn’t pass. In the example above, "cat" and "dog" are not equal, so the else block runs and the variable outcome gets the value "else block"....

developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Operators › Conditional_operator

Conditional (ternary) operator - JavaScript - MDN Web Docs

js · function example() { if (condition1) { return value1; } else if (condition2) { return value2; } else if (condition3) { return value3; } else { return value4; } } if...else · Nullish coalescing operator (??) Optional chaining (?.) Learn: Making decisions in your code — conditionals ·