In VB.NET, how do Sub and Function differ?

A Sub performs an operation without retu ing a value through its declaration, while a Function retu s a value of a declared or inferred retu type. Both can accept parameters and can have observable effects. Choose a Function when the caller needs a result, such as a calculated total, and keep the type explicit in public APIs. A Sub can still modify shared state or an argument through ByRef, so retu ing nothing does not mean doing nothing. These questions use VB.NET rather than legacy VB6 unless stated otherwise.