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def sum(n):
    s=0
    for i in range(1,n+1):
        s=s+i
    return s
print("自然数1到n的和为:",sum(100))

Success #stdin #stdout 0.02s 3792KB

stdin

Standard input is empty

stdout

自然数1到n的和为: 5050

https://ideone.com/ttoCDG

language:

Python 3 nbc (python 3.7.3)

created:

visibility:

public

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