What's the mistake with this code?

Question

This code give the sum of N numbers
N = int(input())
#your code goes here
Z=range (N)
x=0
for i in Z :
x=x+i
print (x)

Answer 1

Z=range (N+1)

Answer 2

It should be something lile this:
N = int(input())
x = 0
for i in range(N+1):
x += i
print(x)

Answer 3

Thanks all🥰

Answer 4

n = int(input())

Mathematical Solution
Ans= n*(n+1)/2

Brute forcing
Ans = sum(range(n+1))