The Difference between Function and Subroutine in VBScript

In VBScript, a function and a subroutine both serve as reusable blocks of code, but they have some key differences:

• Function: A function returns a value to the calling code. It is designed to perform a specific task and then return a value back to the calling code.
• Subroutine: A subroutine, also known as a sub, does not return a value. It is used to perform a specific task without returning any value.

When to Use Each One:

Use a function when you need to perform a task that returns a value, such as calculations or data manipulation that will be used elsewhere in the code. Functions are ideal for tasks that require a result.

Use a subroutine when you just need to execute a task without returning any value. Subroutines are used for tasks that do not require a return value, such as displaying a message or updating a database.

Understanding the difference between functions and subroutines in VBScript is essential for writing efficient and reusable code.