Round off a number to the next multiple of 5 using JavaScript

In this article, we are given a positive integer n and the task is to round the number to the next whole number divisible by 5.  There are various methods to Round off a number to the next multiple of 5 using JavaScript:

• Using Math.ceil() method
• Using Math.floor() method

Examples:

Input : 46 
Output : 50

Input : 21
Output : 25

Input : 30 
Output : 30

Approach 1:

• Take the number in a variable.
• Divide it by 5 and get the decimal value.
• Take the ceil value of the decimal value by using math.ceil().
• Multiply it by 5 to get the result.

Example:

javascript

<script>
    function round(x) {
        return Math.ceil(x / 5) * 5;
    }

    var n = 34;
    console.log(round(n));
</script>

Output:

35

Approach 2:

• Take the number in a variable.
• If it is divisible by 5, return the same number.
• Else divide it by 5, take the floor value and again multiply it by 5 and add 5 as well.

Example:

javascript

<script>
    function round(x) {
        if (x % 5 == 0) {
            return (Math.floor(x / 5)) * 5;
        } else {
            return ((Math.floor(x / 5)) * 5) + 5;
        }
    }

    var n = 34;
    console.log(round(n));
</script>

Output:

35