Back to the lesson

Function pow(x,n)

importance: 4

Write a function pow(x,n) that returns x in power n. Or, in other words, multiplies x by itself n times and returns the result.

pow(3, 2) = 3 * 3 = 9
pow(3, 3) = 3 * 3 * 3 = 27
pow(1, 100) = 1 * 1 * ...*1 = 1

Create a web-page that prompts for x and n, and then shows the result of pow(x,n).

Run the demo

P.S. In this task the function should support only natural values of n: integers up from 1.

function pow(x, n) {
  let result = x;

  for (let i = 1; i < n; i++) {
    result *= x;
  }

  return result;
}

let x = prompt("x?", '');
let n = prompt("n?", '');

if (n <= 1) {
  alert(`Power ${n} is not supported,
    use an integer greater than 0`);
} else {
  alert( pow(x, n) );
}