字符格式化输出
占位符 %s s = string
%d d = digit 整数
%f f = float 浮点数,约等于小数
name = input("Please input your name :")
sex = input("Please input your sex :")
age = input("Please input your age :")
if age.isdigit():
age = int(age)
else:
print("You must input a digit")
job = input("Please input your job :")
salary = input("Please input your salary :")
msg = """---------info of %s-----------
Name = %s # %是占位符,s为字符串类型
Sex = %s
Age = %s
Job = %s
Salary = %s
You will be retired in %s years !
---------------end-------------""" %(name,name,sex,age,job,salary,65-age)
print(msg)
字符串
salary.isdigit() 校验salary是否为整型
计算机中, 一切皆为对象
世界万物,皆为对象,一切对象皆可分类