# Check if a variable is divisible by 2 in JavaScript

In this tutorial, we are going to learn about how to check if a given variable is divisible by 2 or not in JavaScript with the help of examples.

Consider, we have a following variable:

`const a = 10;`

To find if a above variable is divisible by 2 or not, the variable should be divided by 2 and the remainder should be `0`

.

## Using % Modulo operator

To check if a variable is a divisible by 2 or not, we can use the `%`

modulo operator in JavaScript.

The modulo `%`

operator returns the remainder of the first number and second number like this
`10 % 2 = 0`

, so if we get a remainder `0`

then the given number is a divisible of another number. otherwise it is not a divisible of another number.

Here is an example:

```
const a = 10;
if (a % 2 === 0) {
console.log("a is divisible by 2");
} else {
console.log("a is not divisible by 2");
}
```

Output:

`"a is divisible by 2"`

In the above code, we have added the `a % 10 === 0`

in if condition, so if the variable `a`

is divided by 2 and returns the remainder `0`

, then it logs the output “a is divisible by 2”, otherwise it logs `"a is not divisible by 2"`

.

Example 2 :

```
const b = 20;
if (b % 2 === 0) {
console.log("b is divisible by 2");
} else {
console.log("b is not divisible by 2");
}
```

Output:

`"b is divisible by 2"`

## Checking if a number is not divisible by 2

To check if a number is not divisible by 2, we can use the modulo operator `%`

but the remainder of first number by second number is not equal to 0.

Here is an example:

```
const c = 23;
if (c % 2 != 0){
console.log("c is not divisible by 2");
}
```

In the above code, 23 is divided by 2 and returns the remainder 3. So the given number is not a divisible of 2.