23. what is pass by value and pass by reference

Question

Accepted Answer

Pass by value and pass by reference are two different ways of passing arguments to a function or method.

Pass by value means that a copy of the argument is passed to the function, so any changes made to the argument within the function do not affect the original value.
Pass by reference means that a reference to the argument is passed to the function, so any changes made to the argument within the function will affect the original value.
In pass by value, the function works with a local copy of the argument, while in pass by reference, the function works directly with the original argument.
Pass by value is used for simple data types like integers, floats, and characters, while pass by reference is used for complex data types like arrays and objects.

Accepted Answer

Pass by value- is default parameters.

Which formal parameters effect the actual parameters.

Pass by reference.

Which not formal attributes not affect the actual parameters.

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