1
number = 1
2
total = 0 #计数器
3
while number <= 100: #循环执行条件：直到number小于等于100时
4
    total += number #使每一次循环的number值加到一起
5
    number += 1
6
print(total)

1
number = 1
2
total_odd = 0  # 奇数和计数器
3
while number <= 99:
4
    total_odd += number
5
    number += 2  # 每次加2，只取奇数
6
print("奇数和：", total_odd)

1
number = 2
2
total_even = 0  # 偶数和计数器
3
while number <= 100:
4
    total_even += number
5
    number += 2  # 每次加2，只取偶数
6
print("偶数和：", total_even)