Hacker-rank staircase.js

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}

// Complete the staircase function below.
function staircase(n) {
    let stair, space, hash;

    for (let i = 0; i < n; i++) {
        space = n - 1 - i;
        hash = i + 1;
        stair = ' '.repeat(space) + '#'.repeat(hash);
        console.log(stair);
        
    }

    

}

function main() {
    const n = parseInt(readLine(), 10);

    staircase(n);
}