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