output

Question

I don't understand, the output of def func(x):
res = 0
for i in range(x):
res += i
return res

print(func(4))

is 6, but shouldn't it be 10? because 1+2+3+4=10? I am confused

Answer 1

for i in range(x) -> excluding x
i starts at 0 and ends at 3.

You can see it when you add a print statement inside the loop.