What is the difference between call by value and call by reference?

Question

Accepted Answer

Call by value passes a copy of the value, while call by reference passes a reference to the original value.

Call by value creates a new copy of the value being passed.
Call by reference passes a reference to the original value.
Changes made to the parameter in call by value do not affect the original value.
Changes made to the parameter in call by reference affect the original value.

Accepted Answer

*call by value* : passes a copy of the value, while call by reference passes a reference to the original value. -Call by value creates a new copy of the value being passes. -Call by reference passes a reference to the original value. Changes made to the parameter in call by value do not affect the original value. -Changes made to the parameter in call by reference affect the original value.

Accepted Answer

In Call By Value Or Pass By Value Concept, we pass a copy of the value through actual argument to the formal argument then any changes made in formal argument doesn't reflect to the actual argument.
In Call By Reference Or Pass By Reference Concept, we pass a copy of the value through actual argument to the formal argument then any changes made in formal argument reflects in actual argument.

Accepted Answer

Call by value ----> The function is called by directly passing value of variable as argument.

Call by reference ----> The function is call by directly passing address of variable as argument.

Call by value ----> We need to declare a general variable as function argument.

Call by reference ----> We need to declare a pointer variable as argument.

Accepted Answer

In Call by value, a copy of the variable is passed whereas in Call by reference, a variable itself is passed. In Call by value, actual and formal arguments will be created in different memory locations whereas in Call by reference, actual and formal arguments will be created in the same memory location.