Solving the staircase problem in JavaScript

The following is my solution to the Staircase problem. I’m using String.prototype.padStart to add the appropriate number of spaces in order to build the rises and making sure to right-align the steps. I also use String.repeat() to build the steps that make up the staircase.

Problem

Write a program that prints a staircase of size n. Where n is an integer.

Constraints

• 0 < n ≤ 100

Output Format

Print a staircase of size n using # symbols and spaces.

NOTE The last line must have 0 spaces in it.

Solution

function staircase (n) {
  for (let i = 1; i <= n; i++) {
    const step = '#'.repeat(i); // create a step
    const rise = String.prototype.padStart.call(step, n, ' '); // Add necessary spaces
    console.log(rise);
  }
}

Demo

JS Bin