TIL: How to Trim Trailing Zeros【CodeWars】

Overview 🔍

No zeros for heros

This question requires removing trailing zeros from a number while preserving its integrity.

Input and Output Examples:

1450 -> 145

960000 -> 96

1050 -> 105

-1050 -> -105

Difficulty Level:

8kyu (easiest level on Codewars)

Solutions 💡

Solutions 1

function noBoringZeros(n) {

  while (n % 10 === 0 && n !== 0) {

    n = n / 10

  }

  return n

}

• Procedural programming approach using while loop.

Solutions 2

const noBoringZeros = n => n % 10 === 0 && n !== 0 ? noBoringZeros(n / 10) : n;

• Declarative programming approach using recursion.

Solutions 3

function noBoringZeros(n) {

  return +`${n}`.replace(/0*$/, "");

}

• Uses a regular expression to remove trailing zeros.


• Converts the number to a string using template literals (${}), applies .replace(), and reconverts the result to a number using the + operator.

Solutions 4

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• Overly complex solution. (but I like it.)

Discussion and Insights 💭

I prefer "Solution 3" because it's simple and reader-friendly while still demonstrating some useful techniques.

If you're curious about these solutions or want to explore more challenges, visit here.

Thank you for reading! 🙌