变量的补充

有三种变量方法：

1 name = input("name:")
2 age = int(input("age:") )
3 job = input("job:")
4 salary  = input("salary:")

#第一种
info = '''
-------- info of  %s  -----
Name:%s
Age:%d
Job:%s
Salary:%s
''' % (name,name,age,job,salary)
print(info)

#第二种
info2 = '''
-------- info of {_name}  -----
Name:{_name}
Age:{_age}
Job:{_job}
Salary:{_salary}
'''.format(_name=name,
           _age=age,
           _job=job,
           _salary=salary)

#第三种
info3 =  '''
-------- info of {0} -----
Name:{0}
Age:{1}
Job:{2}
Salary:{3}
'''.format(name,age,job,salary)
print(info3)
"""

运行结果为：

 1 name:tiger
 2 age:18
 3 job:studen
 4 salary:40000
 5 
 6 -------- info of  tiger  -----
 7 Name:tiger
 8 Age:18
 9 Job:studen
10 Salary:40000