Can someone explain how the result is 6 ??

Question

def sum(x):
res = 0
for i in range(x):
res+-i
return res

print(sum(4))

Answer 1

عثمان محمد ابراهيم.
Note that use relevant tags instead of `u`.
this is python program so this is best way if you Use python instead of `u`

We get `6`. This is because the sum of all the numbers from 0 to 3 is 6 (0 + 1 + 2 + 3 = 6).

However, there is a mistake in this code. For fix the issue change `res+=i` instead of`res +-i`.