How to recreate pyramid triangle?

Question

I have to write a recursive function asterisk_triangle which takes an integer and then returns an asterisk triangle consisting of that many lines.

Answer 1

If you need to do a pyramid recursively you probably need to do something like this.

def asterix_triangle(i, t=0):
    if i == 0:
        return 0
    else:
        print ' ' * ( i + 1 ) + '*' * ( t * 2 + 1)
        return asterix_triangle(i-1, t + 1)

asterix_triangle(5)

The idea is that you use two variables. One which is i that that subtract once every time the function is called and is used to end the cycle. The other variable is used to have an incremental increase. You then use i to print the number of spaces, and t the number of stars.

The output would be:

      *
     ***
    *****
   *******
  *********