homework day1

2

name = input(">>>")
print(type(name))

3

age = 19
sex = "男"
if age > 18:
print("ok")

二选一

if age < 18:
print("未成年")
else:
print("成年")

多选一或零

if age > 25:
print("大于25")
elif age > 22:
print("大于22")
elif age > 18:
print("大于18")

多选一

if age > 25:
print("大于25")
elif age > 22:
print("大于22")
elif age > 19:
print("大于19")
else:
print("不详")

多选多

if age > 18:
print("大于18")
if age > 15:
print("大于15")
if age > 12:
print("大于12")

if嵌套

if age > 18:
if sex == "男":
print("ok")

4

print("""
文能提笔安天下,
武能上马定乾坤.
心存谋略何人胜,
古今英雄唯世君.""")

5

answer = 66
while True:
guess_number = int(input("请输入猜测结果："))
if guess_number > answer:
print("太大了")
continue
elif guess_number < answer:
print("太小了")
continue
else:
print("猜对了")
break

6ge = int(input("请输入年龄:"))

if age <=10:
print("小屁孩")
if age > 10:
if age <= 20:
print("青春期叛逆的小屁孩")
if age > 20:
if age <= 30:
print("开始混社会小屁孩儿")
if age > 30:
if age <= 40:
print("看老老大不了,赶紧结婚小屁孩儿")
if age > 40:
if age <= 50:
print("家里有个不听话的小屁孩儿")
if age > 50:
if age <= 60:
print("自己马上变成不听话的老屁孩儿")
if age > 60:
if age <= 70:
print("活着还不错的老屁孩儿")
if age > 70:
if age < 90:
print("人生就快结束了的一个老屁孩儿")
if age > 90:
print("再见了这个世界")

7

单行注释

"""

多行注释

8

python2:

源码不统一
有重复代码
整型的除法:整数
不加括号也可以
input() 输入什么类型就是什么类型
raw_input() 获取到的都是字符串

python3:

源码统一
没有重复代码
整型的除法:浮点数(小数)
print()
input 获取到的都是字符串

9

username = input("请输入用户名：")
if username == "麻花藤":
print("真聪明")
else:
print("输入错误")

10

month = int(input("请输入月份:"))
if month == 1:
print("一月,香肠")
elif month == 2:
print("二月,鸡")
elif month == 3:
print("三月,鱼")
elif month == 4:
print("四月,牛")
elif month == 5:
print("五月,羊")
elif month == 6:
print("六月,鸭")
elif month == 7:
print("七月,狗肉")
elif month == 8:
print("八月,猪蹄")
elif month == 9:
print("九月,撸串儿")
elif month == 10:
print("十月,月饼")
elif month == 11:
print("十一月,鹅肉")
elif month == 12:
print("十二月,腊肉")
else:
print("done")

11

num = int(input("请输入数字:"))
if num90:
print("A")
elif num80:
print("B")
elif num70:
print("C")
elif num60:
print("D")
else:
print("不及格")