JSFiddle - React, Tailwind, and code Playground

JavaScript

const smallestDivisor = (num) => {
  // BEGIN (write your solution here)
    if (num>1){
      const sum = (div) => {
        if (num%div===0){
          return div;
        }
        return sum(div+1);
      }
    }
    return num;
};
smallestDivisor(10);