Call By Value & Call By Reference

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FORMAL PARAMETER - These are the parameters which appear in the function definition or declaration is called Formal Parameter.


 ACTUAL PARAMETER - These are the parameters which appear in the function call is called Actual Parameter.




Call By Value -

 In Call By Value , value of actual parameter is copied into Formal Parameter.
The function work on formal parameter only.
Actual parameter is intact.
Change are not reflected is called function.





Call By Reference - 

 In this type, instead of copying a value of actual parameters into formal parameter, the function receive address of the actual parameter.
Works on the original value,
Changes are reflected in the calling function.






Summary - 




  By - Somesh Sah



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