# ### 关键字的使用 pass / break / continue

# pass 过 起到占位的作用

if 5 == 5:

    pass

    print(123)

# break 只能应用在循环当中 用于终止当前循环

# 打印1~10 遇到5终止循环

i =  1

while i <= 10:

    if i == 5:

        break

    print(i)

    i += 1

# 打印三行两列数字

i = 1

while i <=3:

    j = 1

    while j <=3:

        if j ==2:

            break

        print(i,j)

        j += 1

    i += 1

# continue 跳过当前循环,从下一次循环开始

# 打印1~10 不打印5

i = 1

while i <=10:

    if i == 5:

        i += 1

        continue

    print(i)

    i += 1

# 打印所有1~100 不含有4的数

# 方法一

i = 1

while i <= 100:

    if "" in str(i):

        i += 1

        continue

    print(i)

    i += 1

# 方法二

print("<=====>")

i = 1

while i <= 100:

    if i // 10 == 4 or i % 10 == 4:

        i += 1

        continue

    print(i)

    i += 1