Calling Functions: Call by Value and Call by Reference.

Used when invoking functions

1. Call by value

   • Copy of argument passed to function

   • Changes in function do not effect original

   • Use when function does not need to modify argument

   • Avoids accidental changes

2. Call by reference

   • Passes original argument

   • Changes in function effect original

   • Only used with trusted functions

   • We will use it with Arrays and pointers

For now, we focus on call by value .