# Corner digit number difference - JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

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We are required to write a JavaScript function that takes in a number, constructs a new number from the first and last digit of that number and returns the difference between the original number and the number thus formed.

For example: If the input is 34567

Then the corner digits number will be −

37

And the output will be −

34530

## Example

Following is the code −

const num = 34567;
const cornerDifference = num => {
let temp = Math.abs(num);
let corner = temp % 10;
if(temp < 100){
corner = temp;
}else{
while(temp >= 10){
temp = Math.floor(temp / 10);
};
corner = (temp*10) + corner;
};
return num - corner;
};
console.log(cornerDifference(num));

## Output

Following is the output in the console −

34530