Find Difference Between Greatest and Smallest Digit in a Number using JavaScript

We are required to write a JavaScript function that takes in a number and returns the difference between the greatest and the smallest digit present in it.

For example: If the number is 5464676, then the smallest digit here is 4 and the greatest is 7

Hence, our output should be 3

Example

Let’s write the code for this function −

const num = 44353456;
const difference = (num, min = Infinity, max = -Infinity) => {
   if(num){
      const digit = num % 10;
      return difference(Math.floor(num / 10), Math.min(digit, min),
      Math.max(digit, max));
   };
   return max - min;
};
console.log(difference(num));

Output

The output in the console: −

3