打印偶数

n = 1
while n<=10:
    if n%2 ==0:
        print(n)

    n += 1

n = 2
while n <= 10:
    print(n)
    n += 2

n = 0

while n <= 100:
    n += 1
    # 如果是奇数，使用continue跳过当前循环，进入下次循环
    if n % 2 == 1:
        continue
    print(n)

for i in range(0, 100, 2):
    print(i)