Skip to main content

Reverse Number

reverseNumber​

The reverseNumber function reverses the digits of a given number. For negative numbers, the sign is preserved, but the digits are reversed.

Function Signature​

reverseNumber(num: Numeric): number;

Parameters​

  • num: The number (or numeric string) to be reversed.

Return Value​

  • Returns the number with its digits reversed. If the input number is negative, the negative sign is preserved.

Example Usage​

Basic Reversal​

import { reverseNumber } from 'nhb-toolbox';

console.log(reverseNumber(123));  // 321

Handling Negative Numbers​

import { reverseNumber } from 'nhb-toolbox';

console.log(reverseNumber(-456));  // -654

Reversing Stringified Numbers​

import { reverseNumber } from 'nhb-toolbox';

console.log(reverseNumber('789'));  // 987

Notes​

  • The function uses Math.abs to handle negative numbers and preserve the sign after reversing.
  • Converts the number to a string, reverses the string, and then converts it back to a number.
  • It handles stringified numbers as well.

Conclusion​

The reverseNumber function is a simple utility to reverse the digits of a number, while maintaining the sign for negative numbers. This can be useful for tasks such as numerical analysis or generating patterns.