How to make a triangle using a for loop in Python

Question

I'm new to programming and have been experimenting with for loops to try and figure out how to make different shapes however I have encountered a problem that I cannot solve.

So far I have been able to create a rectangle of 1's as shown below in a 5X5

for i in range(0, 5):
  X = 0
  for j in range(0, 5):    
  X = (X*10)+1
  print(X)

I would like to be able to modify this code using a for loop to be able to create a triangle like so...

1 1 1
1 1
1

How would I go about doing this? Is there also a way that I could input n and dependant on whatever number is input the program creates a triangle of that size? for example I input a 5 and it creates a triangle like...

Ive tried various different things but i'm unable to figure it out.

How about for j in range(0, 5-i):?

Amberlamps
– Amberlamps

2013-08-06 08:55:10 +00:00
Commented Aug 6, 2013 at 8:55 — Amberlamps
– Amberlamps, Commented Aug 6, 2013 at 8:55

alecxe · Accepted Answer · 2013-08-06 08:55:53Z

1

def triangle(c, n):
    for i in xrange(n, 0, -1):
        print c * i

triangle("X", 5)

prints:

XXXXX
XXXX
XXX
XX
X

answered Aug 6, 2013 at 8:55

alecxe

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Comments

sliders_alpha · Accepted Answer · 2013-08-06 09:14:06Z

0

don't try to modify it. make a new one

def generateLine(size):
    line = ""
    for i in range(0, size):
        line = line+"1"
    return line

for i in range(6, 0):
    print generateLine(i)

edited Aug 6, 2013 at 9:14

answered Aug 6, 2013 at 9:05

sliders_alpha

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