Call By Value & Call By Reference in C 

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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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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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This is one of the most searched topic in C programming after Pointers.

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3:31 The confusion started, when Kernigan & Ritchie declared addresses to be "values" (probably for washing their hands of preceding programming languages). Think in the context of C++, where references are formally defined and are the same as dereferenced pointers, one might finally find the semantics of "call by reference" in C. This is well done here ! 🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟

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Best video I have ever seen detailed explanation.. It made my concepts clear.

00:02 This video explains the concepts of Call By Value and Call By Reference in C 00:57 Call By Value & Call By Reference in C 01:56 Difference between call by value and call by reference 04:11 Understanding Call By Value & Call By Reference in C 04:46 Address- They Give Who Will Request 05:32 Understanding the concept of Call By Value and Call By Reference 06:28 Call By Value & Call By Reference in C 07:32 Understanding the difference between call by value and call by reference in C Crafted by Merlin AI.

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thanks to you, now i can see why we do pass an address to the scanf function

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So calm voice!

Along with the crytsal clear explanation, this is therapeutic ngl

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Very Well and clear explanation...👏 Thank you so much sir...

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Thanks sir! You help me to revise the concept of call by reference as well as call by value.

&x: means go to the address of x *x: means go to whatever lives at x We can use this function for swapping: void(int *, int *); int main(void) { int x = 10, y = 20; printf("%d %d ",x,y); // 10 20 f(&x,&y); printf("%d %d ",x,y); // 20 10 return 0; } void f(int *ptrx, int *ptry) { int tmp = *ptrx; // tmp = 10 *ptrx = *ptry; // *ptrx = 20 *ptry = tmp; // *ptry = 10 return; }

Best explanation on internet...

I am really learning a lot from your tutorials and I learning C Programming. Can you please create like a playlist to group all the lessons for C? They seem to mixed up. Thank you.

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came here 1 day before examination and understood completely thkyou

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Best video in youtube for Call By Value & Call By Reference differenece

U explain so well man...loved it

Thank you so much! Helped a tons!

Great respect helped me to revise my concepts.