8.28

if语句

如果语句，相当于现实世界中的判断

1.
dog_name = 'dachangtui'
if dog_name == 'dachangtui':
    print('干它')
if dog_name == 'fenggou':
    print('干掉它')
2.
grade = 10
if grade >= 90:
    print('优秀')
elif grade >= 80:
    print('良好')
elif grade >= 70:
    print('普通')
else:
    print('差')

for循环

重复做一件事

for j in range(1,13):
    for i in range(1, 32):
        if j == 2 and i> 28:
            continue#停止当前本次循环,继续执行下一次循环
        elif j in[4,6,9,11] and i>30:
            continue
        for abc in range(1,8):
            print(f'{j}月{i}日星期{abc}')

continue#停止当前本次循环,继续执行下一次循环
break #中断循环