Finding the smallest multiple in JavaScript

We are required to write a JavaScript function that takes in a number as the only input. The function should find the smallest such number which is exactly divisible by all the first n natural numbers.

For example −

For n = 4, the output should be 12,

because 12 is the smallest number which is divisible by 1 and 2 and 3 and 4.

Example

The code for this will be −

const smallestMultiple = num => {
   let res = 0;
   let i = 1;
   let found = false;
   while (found === false) {
      res += num;
      while (res % i === 0 && i <= num) {
         if (i === num) {
            found = true;
         };
         i++;
      };
      i = 1;
   };
   return res;
};
console.log(smallestMultiple(2));
console.log(smallestMultiple(4));
console.log(smallestMultiple(12));
console.log(smallestMultiple(15));

Output

And the output in the console will be −

2
12
27720
360360

AmitDiwan

Published on 25-Nov-2020 16:45:32