sigma 계산기

#sigma calculator

q=int(input("숫자를 입력하세요:"))

Sigma=0

for i in range(1,q+1):

    Sigma +=i

print(Sigma)

def sigma_sum(n):

    tot =0

    for  i in range(1,n+1):

        tot= tot+i

    return tot

print(f'ex1 결과:{sigma_sum(10000)}')

#방법2

def sigma_sum_2(n):

    return n*(n+1)//2

print(f'ex2 결과:{sigma_sum_2(10000)}')

def sigma_sum_3(n):

    return sum(range(n+1))

print(f'ex3 결과:{sigma_sum_3(10000)}')