Function in vba with one argument

Creating Function which allow us to pass one arguments.
User Define function are helpful when the existing Excel functions are not enough to solve our purpose.
In such cases, you can create your own custom User Defined Function (UDF) to cater to your specific needs.
Custom Function (also called a User Defined Function) that can be used in the worksheets just like regular functions/formula.
Example: We required a formula to calculate total salary with hike of employee which is based on Current salary and percentage.