判断变量像不像整数、占位符和格式化输出

name = input("Name: ")
age = input("Age: ")
job = input("Job:")
salary = input("Salary: ")

# ~ 判断变量salary像不像整数
if salary.isdigit():
    salary = int(salary)
else:
    # ~ exit()退出整个程序
    exit("You must input a digit.")

"""
占位符  %s    s = string  字符串
       %d    d = digit   整数
       %f    f = float   浮点数
"""

# ~ 格式化输出    
msg = '''
------ info of %s ------
Name: %s
Age : %s
Job : %s
Salary: %d
------ end ------
'''% (name,name,age,job,salary)

print(msg)