what is the mean of question mark in javascript

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In JavaScript, the question mark “?” is commonly used as part of the ternary conditional operator, also known as the ternary operator. It provides a concise way to write conditional statements.

Ternary Conditional Operator

The ternary operator has the following syntax:

    condition ? expressionIfTrue : expressionIfFalse

Usage and Example

Here’s an example of using the ternary operator:

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    let isEven = (num % 2 === 0) ? true : false;

In this example, if the condition num % 2 === 0 is true, the value of isEven will be true, otherwise, it will be false.


The ternary operator reduces the need for verbose if-else statements and makes code more concise.


The question mark “?” in JavaScript is a fundamental component of the ternary conditional operator, enabling concise conditional expressions in code.

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