drawStairs.js

// given a number n, draw stairs with 'I' n tall and n wide, with the tallest in the top left. Example (with - to represent spaces; DO NOT USE THEM IN THE SOLUTIONS! USE SPACES IN SOLUTION! the "-"s are for clarity.): draw_stairs(3) == '''I\n_I\n__I'''

// For example, a 7-step stairs should be drawn like this:

// const sevenStepStairs = drawStairs(7);
// I
//  I
//   I
//    I
//     I
//      I
//       I



function drawStairs(n) {

    let stairs = "";

    for (let i = 0; i < n; i++) stairs += " ".repeat(i) + "I" + (n<=1 || i === (n-1)? "" : "\n");

    return stairs;

}


console.log(drawStairs(1));