kiran.r

 Profile Answers by kiran.r 

• Jan 2nd, 2008

 

call by context:
      if there is any modifications in sub prograam,it wont effect on main program.
call by reference:
      if there is any modifications in sub prograam,it will effect on mainprogram.

sekhargupta

 Profile Answers by sekhargupta Questions by sekhargupta

• Jan 9th, 2008

 

Call by content : If we change formal arguments (variables used in sub program), their corresponding actual arguments (variables used in main) will not be changed.
ex ) CALL   'subprg' USING BY CONTENT  A, B, C.

Call by reference : If we change formal arguments (variables used in sub program), their corresponding actual arguments (variables used in main) will also be changed.
Call by reference is default.
ex ) CALL   'subprg' USING BY REFERENCE  A, B, C.
                   (OR)
      CALL   'subprg' USING A, B, C.