Question

Explain ‘Call by Value’ and ‘Call by Reference’ methods of function calling with the help of a suitable example.

Answer 1

Two types are call by value and call by reference. 

1. Call by value: 

In call by value method the copy of the original value is passed to the function, if the function makes any change will not affect the original value.

Example

2. Call by reference: 

In call by reference method the address of the  original value is passed to the function, if the function makes any change will affect the original value. 

Example