JavaScript Code

Check if number is negative in JavaScript

In this tutorial, you are given a number. Write a JavaScript program to check if the number is negative.

Solution

A number is negative if it is less than 0. To check if given number is negative, we have to check if it is less than 0. We can use comparison less than operator to check if given number is less than 0.

Program

1. In the following program, you are given a number in n. We shall check if n is a negative number.

let n = -4;
if ( n < 0 ) {
    console.log('negative number');
} else {
    console.log('not a negative number');
}

We have used the condition with if-else statement.

2. Now, we shall take a positive number in n and programmatically check if n is negative or not.

let n = 6;
if ( n < 0 ) {
    console.log('negative number');
} else {
    console.log('not a negative number');
}