How to write a stored procedure in SQL and use if else statements in it

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ASP.NET

SQL

I have an employee table with fields EmpId , EmpName , DeptID , Salary , EditedOn, EditedBy and Address .It has following entries:

EmpId   EmpName DeptID  Salary  EditedBy EditedOn       Address
1	Sonia	2	25000	1	2015-02-10	NULL
2	Rahul	1	15000	1	2015-01-10	NULL
3	Pooja	3	12000	1	2015-04-05	NULL
5	Tanya	7	32000	1	2015-04-10	NULL
6	Raj	8	27000	1	2015-04-03	NULL
16	NULL	1	NULL	NULL	2015-04-15	NULL
17	NULL	1	NULL	NULL	2015-04-15	NULL
18	NULL	1	NULL	NULL	2015-04-15	NULL
19	Roshni 	NULL	NULL	NULL	NULL	        Vasco
27	gh	NULL	NULL	NULL	NULL	        kk
28	Priyanka 	7000	NULL	NULL		Porvorim 
29	Ramesh 	NULL	NULL	NULL	NULL	        Vasco 

I want to create a strored procedure proc_GetEmployeeOnSalaryrange and specify foll conditions :

if salary is between ( 0-10000) 
Select EmpName, Salary , 'Range A' 
Else if salary is between ( 10001-20000)
Select EmpName, Salary , 'Range B' and third condition is :
if salary is above 20000 
Select EmpName, Salary , 'Range C'

and Range A , Range B and Range C should be hard coded . I dont know the if else syntax to be used. so please help .