Python3 基础语法

#输出print("内容")#输入input("等待您的输入")#赋值a,b=1,"haha"#字符串操作str="sheisbueatiful"#裁剪字符串print(str[1:5])#多次输出print(str*3)#集合#元素能被修改list=["java","hadoop","python","other"]#元素不能被修改（相当于字符串）tuple=("java","hadoop","python","other")#元素无序，不能重复set={"java","hadoop","python","other"}#key-value集合类型map={"name":"java","password":"java123","age":18}print(map["age"])print(map.keys())print(map.values())

逻辑运算

#ifa=70if a>90:    print("A")elif a>80:    print("B")elif a>60:    print("c")else:    print("D")

#forcan=["java","c","c#","python"]for x in can:    print(x)

#whilea,b=0,1while b<10:    print(b)    a,b=b,a+b

#遍历list=[1,2,3,4]it=iter(list)print(next(it))

#rangefor x in range(1,10):    print(x)# 1-9

函数

def hello():    print("hello world!")# hello()def area(w,h):    return w*hdef welcome(name):    print("welcome",name)print("fozzz")w=1h=2print("w=",w,"area=",area(w,h))