Coding basics · 5 of 20
Add up 1 to n
Return 1 + 2 + … + n. For n = 0 the sum is 0.
What you need
A for loop repeats its indented lines once for each value. range(a, b) counts from a up to b - 1, so range(1, n + 1) is 1 to n. += adds to a variable.
for i in range(1, 4):
print(i) # 1, then 2, then 3Examples
Input n = 5
Output 15
1 + 2 + 3 + 4 + 5
Input n = 0
Output 0