Source: wikibot/kaprekar-s-routine
= Kaprekar's routine
{wiki=Kaprekar's_routine}
Kaprekar's routine is a fascinating mathematical process named after the Indian mathematician D. R. Kaprekar. It involves taking a four-digit number, performing a series of steps, and often leads to a fixed point known as Kaprekar's constant, which is 6174. Here’s how the routine works: 1. **Choose a four-digit number**: The number must contain at least two different digits (e.g.