Author -  Sai gowtham

# Check if a number is multiple of another number in JavaScript

In this tutorial, we are going to learn about how to check if a number is multiple of another number in JavaScript with the help of examples.

Consider, we have a following number:

``const num = 10``

To find if a above number `10` is a multiple of another number, we should divide the first number by second and get the remainder 0 then only we call it’s a multiple of another number otherwise it is not a multiple.

For example: 10%2 = 0

## Using the % Modulo operator

To check if a number is a multiple of another number, we can use the `%` modulo operator in JavaScript.

The modulo `%` operator returns the remainder of first number by second number eg: `10 % 2 = 0`, so if we get a remainder `0` then the given number is a multiple of another number otherwise it not a multiple.

Here is an example:

``````const num = 10;

if (num % 2 === 0) {
console.log("10 is a multiple of 2");
}else {
console.log("10 is not a multiple of 2");
}``````

Output:

``"10 is a multiple of 2"``

In the above code we have added `10 % 2 === 0` in if condition. so if 10 is divided by 2 and returns the remainder 0 then it prints the output “10 is a multiple of 2”.

Example 2 :

``````if (20 % 2 == 0) {
console.log("20 is a multiple of 2");
}else {
console.log("20 is not multiple of 2");
}``````

Output:

``"20 is a multiple of 2"``

## Checking if a number is not multiple of another

To check if a number is not a multiple of another number, we can use the modulo operator `%` but the remainder of first number by second number is not equal to 0.

Here is an example:

``````if (35 % 2 != 0){
console.log("35 is not a multiple of 2");
}``````

In the above code, 35 is divided by 2 and returns the remainder 5. So `35` is not multiple of 2.

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