Python Loop

For

for x in range(1, 101):
    if x % 2 == 0:
        sum += x

While

while True:
    counter += 1
    number = int(input('请输入: '))
    if number < answer:
        print('大一点')
    elif number > answer:
        print('小一点')
    else:
        print('恭喜你猜对了!')
        break