Can't get left aligned triangle to be right aligned triangle

Question

i'm trying to make a right aligned triangle. I am able to make a left aligned triangle easily, but can't get the number of spaces to decrease with each additional row.

output should be:

       #
      ##
     ###
    ####
   #####

 let levels = 8; let hash = ''; for (let i = 1; i <= levels; i++) { hash += '#'; console.log(hash) } 

Answer 1

Instead of reusing the same string, consider generating each row with repeat() and padStart() :

 function rightAlignedTriangle (levels) { for (let i = 1; i <= levels; i++) { const row = '#'.repeat(i).padStart(levels) console.log(row) } } rightAlignedTriangle(5) 

To implement this using a nested loop instead of string methods, you can manually implement the above two methods as an inner loop on a variable string declared in the outer loop:

 function rightAlignedTriangle (levels) { for (let i = 1; i <= levels; i++) { let row = '' for (let j = 0; j < levels; j++) { if (j < i) { row += '#' } // repeat(i) else { row = ' ' + row } // padStart(levels) } console.log(row) } } rightAlignedTriangle(5)