C++ pass by VALUE vs pass by REFERENCE? 📧

[@BroCodez]

#include
void swap(std::string &x, std::string &y);
int main()
{
std::string x = "Kool-Aid";
std::string y = "Water";
swap(x, y);
std::cout

[@RandomCommentator15]

@@farisvaljevac1478 Yeah this function exists but he is trying to teach about reference and eventually how the built-in swap(x,y) function works under the hood to the beginners. :)

[@ganapathipasupathi1666]

many thanks sir, my many confusions are cleared. I have been watching this series from one week before, Sir did the 👏🙌good job

[@lastwaveundergroundsaviour7037]

i have been trying to do this, now i realize after watching this video that i was doing it backwards. ahaha thanks man

[@Clockwerk777]

So if i understand this correctly, is this the same concept of variable scope? where basically when you pass by value you get local versions of X and Y, which is what the function swaps, rather than the main()value?

[@zakatabishshaikh]

RUclips is full of garbage, But your content bro, is gold. I subscribed you. Best of luck!

[@renusoni6077]

Is it a good practice to always pass variables by reference to the functions?

[@user-dy1vf7lu3i]

1:58
Why don’t we just return X and Y? Void function don’t have return types so we change the “void” to a “string” right? Or is there no such thing as a string function?

[@aliceylan1211]

You could but the point of the video is to demonstrate the difference between passing by reference and passing by value

[@ishaqmangansakan7574]

There is a string function, but it just happens to prefer to use a void function.

[@KrizMo122]

you can also only return 1 value as far as i know

[@harshitrautela6585]

@@KrizMo122 yeah, but if you want to return both, you can use vector of string(but then it will require change in other code too)

[@FrederikWollert]

Nice Video. But should also say that pass-by-value/reference means the same as call-by-value/reference.

[@adnanaman4391]

We are passing Memory Addresses from the main function to the made up Swap func through param &x&y , swapping activity done inside the swap function....then it goes on to display changed vals

[@raiss4679]

so the ampersand & before a variable is the address of that variable in memory. I saw it used in my pointers lesson and this reference lesson. (i dont understand why the instructor seperated them)

[@nkay_02]

No the ampersand is not a address but is a symbol make the parameter a reference parameter to the memory location variable of the argument.
Hope you understand🙏🏾

[@Stisse12]

Did not get the pass by reference, wasnt that the same as by value in the example?

[@garyalvarado2155]

if this is the case shouldnt we always pass parameters by reference?

[@kristijanlazarev]

I see mine are swapping even without passing by reference, why

[@SafwanMashrafiSaraf-ll1wl]

could you post the code here

[@shervin9561]

Thanks a lot!

[@lastwaveundergroundsaviour7037]

oooo interesting

[@user-lyf4isnt7daijobu]

#include
void _swap(std::string x, std::string y); // passing by value
// does not change value in place due to varying scopes(different memory addresses)
void swap(std::string &x, std::string &y); // passing by reference
// "reference" to memory address so that it changes in place
int main()
{
std::string x = "Kool-Aid";
std::string y = "Water";
_swap(x,y);
std::cout

[@WangBingzheng]

why i success just after the first set of function , which the bro says wrong, lol

[@gamsterilyass2952]

bro

[@Jm2010g5]

You're the best, man
Resusbcribing = in progress