Python 3: sum of consecutive numbers

Question

If a user inputs N, and I have to add up all numbers from 1 to N, what is wrong with this code?

N = int(input())
#your code goes here
for i in range (1,N+1):
if sum == (i += i):
print (sum)

Answer 1

This might help.

https://code.sololearn.com/c7Us8liK73vP/?ref=app

Answer 2

without loop:

N = int(input())
print(N*(N+1)//2)

Answer 3

visph Wow awesome solution. Thanks for sharing!

Answer 4

here is a list comprehension that would work as well.

N = int(input())
total = sum([sub for sub in range(1, N+1)])
print(total)

Answer 5

Ислам Алб Your code works just fine, but your procedural approach needs work, I guess. Here are some alternatives:

1.
sum = 0
for i in range(int(input())):
sum += i + 1
print(sum)

2.
sum = i = 0
n = int(input())
while i < n:
sum += i + 1
i += 1
print(sum)

3.
print(sum(range(1, int(input()) + 1)))

4.
n = int(input())
print(n * (n + 1) // 2)

Or

print((n:=int(input())) * (n + 1) // 2)

# I hope this helps

Answer 6

N = int(input())
total = sum([sub for sub in range(1, N+1)])
print(total)

Answer 7

N = int(input())
count = N
x = range(1, N +1)
for i in x:
N = i + N
print(N - count)

Answer 8

N = int(input())
t=0
for e in range(0,N+1):
t+=e
print(t)