1 算术运算符

算术运算符只能用来将同数据类型的进行计算

salary = 3.3 res = salary * 12 print(10 + 1) # 11 print(10 - 3) # 7 print(10 * 3) # 30 print(10 / 3) # 3.3333 print(10 // 3) # 只保留整数部分 print(10 % 3) # 取余数 print(10 ** 3) # 10的3次方 print(10 + 3.1) # 13.1 print(10 % 3.1) # 0.634 

了解,“+” 和 “*” 也能用作于字符串和列表

+ print("abc" + "def") print("abc" + 18) * print("abc"*3) print("=====================") print('hello world') print("="*50) print([1,2,3]+[3,4,5]) print([1,2,3]*3) 

2 比较运算符

x = 10 y = 10.0 print(x == y) m = 10 n = "10" print(m == n) print(10 == [1,2,3]) # == 不限类型 print(10 + [1,2,3]) print(10 == [1,2,3]) print(10 != [1,2,3]) print(10 > 3.1) print(10 >= 3.1) print(10 <= 3.1) print(10 < 3.1) 

注意: “==” 符号俩边可以是不同的数据类型

了解

msg1="hello" msg2="hez" print(msg1 > msg2) l1=[11,"x","abc","ddd"] l2=[11,22,'zz'] print(l1 > l2)