python实现1加到100

'''
python实现任意数到任意数相加，如：1加到100
'''

#第一种是for循环
# 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)

#第二种是while循环
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)

#第三种，导入模块的内建函数reduce，只能整数?
# from functools import reduce
# def sum(x, y):
#     return x + y
# result = reduce(sum, range(1,101))
# print(result)