# Digit distance of two numbers - JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

#### JavaScript for beginners

Best Seller

74 Lectures 10 hours

#### Modern Javascript for Beginners + Javascript Projects

Most Popular

112 Lectures 15 hours

#### The Complete Full-Stack JavaScript Course!

Best Seller

96 Lectures 24 hours

We are required to write a JavaScript function that takes in two numbers a and b returns their digit distance.

## Digit distance

The digit distance of two numbers is the absolute sum of the difference between their corresponding digits.

For example: If the numbers are −

345
678

Then the digit distance will be −

|3-6| + |4-7| + |5-8| = 3 + 3 + 3 = 9

## Example

Following is the code −

const num1 = 345;
const num2 = 678;
const digitDistance = (a, b) => {
const aStr = String(a);
const bStr = String(b);
let diff = 0;
for(let i = 0; i < aStr && i < bStr.length; i++){
diff += Math.abs(+(aStr[i] || 0) - +(bStr[i] || 0));
};
return diff;
};
console.log(digitDistance(num1, num2));

## Output

Following is the output in the console −

9