I need help with a task in my intro to python programming course that requires a code that will print the following using two 'for-loops', one being nested:
0
0 1
0 1 2
0 1 2 3
0 1 2 3 4
0 1 2 3 4 5
0 1 2 3 4 5 6
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7 8
0 1 2 3 4 5 6 7 8 9
So far i have come up with the following code, but my triangle of numbers begins at the digit 1 instead of 0:
for i in range(-1,9):
print ('\n')
for i in range (int(i+1)):
j = i+1
print (j, end=' ')
Can anyone advise what I should do to make my list of digits begin from 0 instead of 1? Also any suggestions on how to make my code more readable? Thanks.
When using range, if you want the last integer to be included, you need to add one. With this in mind, I think the following makes sense:
for i in range(9+1): # +1 since you want the loop to include 9
for j in range(i+1): # +1 since you want your print to include i
print (j, end=' ')
print ('\n')
The print(\n) statement can go before or after your j for-loop, although the output will be slightly different. (Maybe because I'm used to mechanical typewrites, I think of \n as finishing a line rather than getting ready for a new one, but both are reasonable.)
I don't like the idea of starting at -1 so you can then add 1 later. It's unduly complicated, and a bad habit to start with as a beginner.