1、基础格式

1 print("%s" %"hello")#字符串需要''
2 
3 print('%d' % 123)#格式化打印数字 digit
4 
5 print('%f' % 2.5)#格式化打印浮点数 float
6 
7 #%s 占位符

2、练习实例-------格式化打印员工信息

 1 name = print("you name...")
 2 age = print("you age..")
 3 job = input("job...")
 4 salary = input("you salary...")
 5 
 6 message = '''------------info %s -----------------
 7 name = %s
 8 age = %s
 9 job = %s
10 salary = %s
11 you will be reretired %s years....
12 -----------end--------------''' % (name, name, age, job, salary, 65-int(age)) 
13 
14 print(message)
15 #三引号除了注释还可以多行打印

3、判断输入的是否为数字

name = print("you name...")
age = print("you age..")
job = input("job...")
salary = input("you salary...")#定义变量

if (age and salary).isdigit()#digit == 数字（判断输入的值是不是数字）
　　age = int(age)#int == 整数
　　salary = int(salary)
else:
　　print("you must input number age and salary...")
　　exit()#退出
    
message = '''------------info %s -----------------
name = %s
age = %s
9 job = %s
salary = %s
you will be reretired %s years....
-----------end--------------''' % (name, name, age, job, salary, 65-int(age)) 

print(message)
#三引号除了注释还可以多行打印