Call By Value & Call By Reference in C

C Programming & Data Structures: Call By Value & Call By Reference in C
Topics discussed:
1) Call by value method of passing arguments to a function.
2) Call by reference method of passing arguments to a function.
3) Example of the call by value method of passing the arguments.
4) Example of the call by reference method of passing the arguments.

Music:
Axol x Alex Skrindo - You [NCS Release]

#CProgrammingByNeso #CProgramming #CallByValue #CallByReference

[davidmotz]

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[SandipBhattacharya]

Thank you for uploading this video. Let me briefly add by saying, there are two most popular ways to call functions for parameter passing.
Call by Value: This method copies the value of an actual parameter or argument into the formal parameter of the function. Both actual and formal parameters are stored in different memory locations (in RAM). So, any changes made to the formal parameters in the called function are not reflected in the actual parameters in the calling function. By default, C programming uses call by value to pass parameters.
Call by Reference: On the other hand, in the call by reference method, the address of an actual parameter is copied into the formal parameter. Both actual and formal parameters refer to the same memory location. So, any changes made to the formal parameters in the called function are actually reflected in the actual parameters of the caller function. In C, we can use pointers to get the effect of pass by reference or call by reference whatever you call it.
Hope it helps!

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[jagannathanav]

In short, when you pass a variables (say x, y) to a function, the function creates memory locations (local x and local y) which store the same value, but are not same as x and y. Therefore this does'nt affect the values of x and y, this is called as pass by value. When you pass the memory location of x and y itself, the function will change the memory location's value, thereby affecting the variables. this is called pass by reference

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