How to get the first part of this basic loop exercise right?

Question

I am learning Javascript from the book Eloquent Javascript by Marijn Haverbeke, there is exercise at the end of second chapter(Program Structure). Write a loop that makes seven calls to console.log to output the following triangle:

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

I tried to solve it like using a for loop.

var hash = "#";

for(counter = 0; counter < 8; counter ++)
{

   hash = hash + "#";

   console.log(hash);

}

The problem is it's showing not showing the first line of the required output, how do I get that?

I would greatly appreciate any solution especially if it comes with a little explanation.

Answer 1

Nice job since you're just starting.

You almost got it. Just declare the variable as an empty string.

// this is the line that needs to be changed
var hash = '';

for(....) {
  hash += "#";
  console.log(hash);
}

This way as you add to the "hash" variable inside the loop, it doesn't have that extra "#" from variable declaration.