Method Parameters in C#: Types Explained with Examples

Explore the different types of method parameters in C#, including value, reference, output, and params parameters, with clear examples.

Value Parameters

By default, arguments passed to a method in C# are passed by value, meaning a copy of the data is sent to the method, so changes made inside the method don't affect the original variable.

Reference Parameters (ref)

Using the ref keyword allows a method to receive a reference to the original variable instead of a copy, meaning any changes made inside the method are reflected back in the caller's variable.

Output Parameters (out)

The out keyword is used when a method needs to return multiple values. Unlike ref, the variable doesn't need to be initialized before being passed, but it must be assigned a value inside the method.

Params Parameters

The params keyword allows a method to accept a variable number of arguments as an array, giving callers the flexibility to pass anywhere from zero to many values without needing multiple method overloads.