Hackerrank Challenge: https://www.hackerrank.com/challenges/staircase/problem?isFullScreen=true

staircase.js

/*
 * Complete the 'staircase' function below.
 *
 * The function accepts INTEGER n as parameter.
 */

function staircase(n) {
    // Write your code here
    let newString = '';
    let j = n-1; 
    let i = n;
    while (i>0) {
        newString += '#';
        console.log(' '.repeat(j)+newString);
        i--;
        j--;
    }

}