字符串 格式化输出

name = input("name:")
age = int(input("age:"))
job = input("job:")
salary = input("salary:")

if salary.isdigit(): #长的像不像数字，比如200d。“200”
    salary = int(salary)
# else:
#     #print("must input digit")
#     exit("must input digit")# 退出程序
#

msg = '''
------------info of %s-----------
Name:  %s
Age :  %d
Job :  %s
Salary:  %f
You will be retired in %s vears
------------ end ---------------
''' % (name,name,age,job,salary,65-age)
print(msg)

# 字符串格式化输出
#  占位符 %s  s = string
#         %d  d = digit 整数
#         %f  f= float 浮点数，约等于小数。