# Absolute difference of corresponding digits in JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

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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 and 678

Then the digit distance will be −

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

Therefore, let’s write the code for this function −

## Example

The code for this will be −

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

The output in the console will be −

9
Updated on 17-Oct-2020 11:34:57