python学习笔记——Day1

1.1 格式化输出

Name='xW'
age=18
weight=60
num=23
print("my name is %s " % Name)
print("I'm %d years old"% age)
print("I'm %d kg"%weight)
print("my student number is %03d"%num)
print("my name is %s I'm %d years old"%(Name,age))
print("my name is %s I was %d years old last year"%(Name,age-1))
           

1.2 format—f’{}

name='XW'
age=18
print(f"my name is {name} and I'm {age} years old")
           

1.3 结束符

#print()的默认结束符为'/n',也可以自己去设置

print('hello',end=' 嘻嘻')
           

1.4 逻辑运算符{“and”，“or”，“not”}

a=1
b=2
c=3
print(a<b and a<c)
print(a>b and a>c)
print(a<b or a>c)
print(not(a>c)and a<b)

           

1.5 条件判断

age=input("请输入你的年龄  ")
if age > '18':
    print("欢迎光临！")
else :
    if age < '14':
        print("小屁孩，滚远点")
    else :
        print("你不能上网，请离开")
print("系统关闭")