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

Gutha Vamsi Krishna

In this shot, we will learn how to round off a number to the next multiple of 5 using JavaScript.

We will start with the problem statement, followed by an example.

Problem

Given a positive integer i, round i to the next whole number divisible by 5.

Example 1

Input: 47

Output: 50

Explanation: 47 is not divisible by 5, and the next whole number divisible by 5 after 47 is 50.

Example 2

Input: 24

Output: 25

Explanation: 24 is not divisible by 5, and the next whole number divisible by 5 after 24 is 25.

Solution

  • Take the given variable i.
  • Divide variable i with integer 5.
  • Calculate the ceil of the above result.
  • Multiple it with 5.
  • It will give the next whole number divisible by 5 after variable i.

Implementation

Example 1

//given number
let i = 47;

//calculate next whole number divisible by 5 
let nextNum = Math.ceil(i/5) * 5;

//print next number
console.log(nextNum);

Explanation

In the above code snippet:

  • In line 2: We initialize integer i with value 47.
  • In line 5: We divide i with 5 and take the ceil of it. Then, we multiply it with 5 and assign it to the variable nextNum.
  • In line 8: We print variable nextNum to the console which is the next whole number divisible by 5 after the given number 47.

Example 2

//given number
let i = 24;

//calculate next whole number divisible by 5 
let nextNum = Math.ceil(i/5) * 5;

//print next number
console.log(nextNum);

Explanation

In the above code snippet:

  • In line 2: We initialize integer i with value 24.
  • In line 5: We divide i with 5 and take the ceil of it. Then, we multiply it with 5 and assign it to the variable nextNum.
  • In line 8: We print the variable nextNum to the console, which is the next whole number divisible by 5 after the given number 24.

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