triangle numbers

[deanhystad]

The term is "slice", not "crop". Your pyramid program is printing slices o line.

You should not have "magic numbers" in you code like 6. If you change line to "123456", you should not have to know that you must also change 6 to 7. The program should do that for you. Python has a function that returns the number of items in a list. Plus, I don't think you want to use 6. 6 doesn't produce the correct result.

line = 'ABCDE'
for i in range(1, len(line)):
    print(line[-i:])
for i in range(len(line)):
    print(line[i:])

Output:
E
DE
CDE
BCDE
ABCDE
BCDE
CDE
DE
E

If you only want to print 1 element should use indexing, not slicing. This prints elements starting from the end, working tot the start, and then back to the end.

line = 'ABCDE'
for i in range(1, len(line)):
    print(line[-i])
for i in range(len(line)):
    print(line[i])

Output:
E
D
C
B
A
B
C
D
E

How could this be modified to print elements beginning at the start, moving to the end, and then back to the start?