Call by value vs Call by reference.

Question

Can anyone differentiate b/w the two?

Answer 1

call by value passes d copy of a value in a variable which means it wont modify/change the original value of a variable
while
call by reference passes d orginal value of a variable. which means it will modify/change the original value of a variable.

void printValue(int );
void printRef (int*);

int val = 5;
int ref = 7;

int main ()
{
printValue(val);
printRef (&ref);

cout << val; //prints 5
cout << ref; //prints 10

return 0;
}

void printRef(int *r)
{
ref = r + 3;
}

void printValue(int v)
{
val = v + 3;
}

Answer 2

Thanks Raj. I am here to help

Answer 3

nice explanation Franky, 👍, it helps, keep up the good work