python實現1加到100

'''
python實現任意數到任意數相加，如：1加到100
'''

#第一種是for循環
# def sum(start, end):
#     sum = 0
#     for one in range(start, end+1):
#         sum = one + sum
#         one += 1
#     return sum
#
# result = sum(1, 100)
# print(result)

#第二種是while循環
def sum2(start,end):
    i = start
    sum = 0
    while i <= end:
        sum += i
        i += 1
    return sum

result = sum2(-0.01,100.0009)
print(result)

#第三種，導入模塊的內建函數reduce，只能整數?
# from functools import reduce
# def sum(x, y):
#     return x + y
# result = reduce(sum, range(1,101))
# print(result)