Understanding the Difference Between a Function and a Subroutine in VBScript

When it comes to coding in VBScript, it's important to distinguish between functions and subroutines. The main difference lies in their return values:

Function in VBScript

A function in VBScript is a block of code that performs a specific task and returns a value to the caller. It is defined using the Function keyword and can be used to calculate and return a specific result. Functions are ideal when you need to perform a calculation and return a value based on the input parameters.

Subroutine in VBScript

A subroutine, also known as a Sub in VBScript, is a block of code that performs a specific task but does not return a value to the caller. It is defined using the Sub keyword and is used for executing a series of statements or procedures without the need for returning a value. Subroutines are beneficial for performing actions that do not require a return value, such as updating a database or displaying a message.

So, when would you use each one?

Usage of Function vs. Subroutine

- Use a function when you need to perform a calculation and return a value to the caller.

- Use a subroutine when you need to execute a series of statements or procedures without returning a value.

By understanding the difference between functions and subroutines in VBScript, you can efficiently design and implement your code to meet specific requirements.