Passing Arguments in Functions

What happens in the 'Call By Value' method when a function is called?

When is it preferable to use 'Call By Reference'?

What is a characteristic of 'Call By Reference'?

In 'Call By Value', how are the original variables treated in the function?

Which of the following would be a reason to use 'Call By Value'?

What is typically passed in 'Call By Reference' for better efficiency?

In a 'Call By Value' scenario, what does the called function receive?

Which function prototype exemplifies 'Call By Value'?

Which statement best describes the copying method in 'Call By Reference'?

What is a key advantage of using 'Call By Reference' over 'Call By Value'?

Passing Arguments

When invoking a function, arguments can be passed by value or by reference.
Call by Value copies the value of the variable into the function's dummy variable. This keeps the original variable unchanged.
Call by Reference copies the address of the variable into the function's dummy variable. This allows the function to modify the original variable directly.

When to use each method

Use Call by Value when:
- You want to ensure the original variable remains unchanged.
- You are working with small data types (e.g., int, char).
Use Call by Reference when:
- You want the function to modify the original variable.
- You are dealing with large objects and classes where copying would be inefficient.

Example: Swap Function

The example code provides a swap function that swaps the values of two variables.
The first version of the swap function uses Call by Value, which does not modify the original variables.
The second version of the swap function uses Call by Reference, which modifies the original variables directly.

Explore the concepts of passing arguments by value and by reference in programming. This quiz covers the differences between the two methods, when to use each, and includes an example of a swap function. Test your understanding of how arguments affect variable values in functions.