# Finding minimum number of required operations to reach n from m in JavaScript

JavascriptWeb DevelopmentFront End Technology

## Problem

We are required to write a JavaScript function that takes in two numbers, m and n, as the first and the second argument.

Our function is supposed to count the number of minimum operations required to reach n from m, using only these two operations −

• Double − Multiply the number on the display by 2, or;

• Decrement − Subtract 1 from the number on the display.

For example, if the input to the function is −

const m = 5;
const n = 8;

Then the output should be −

const output = 8;

## Output Explanation:

Because the operations are −

5 → 4 → 8

## Example

The code for this will be −

Live Demo

const m = 5;
const n = 8;
const findOperations = (m, n) => {
let res = 0;
while(n > m){
if(n % 2 === 0){
n /= 2;
}else{
n += 1;
};
res += 1;
};
return res + m - n;
};
console.log(findOperations(m, n));

## Output

And the output in the console will be −

2