Active Pattern –

A pattern that enables you to define named partitions that subdivide input data, so that you can use these names in a pattern matching expression.

Explanation:

An active pattern allows you to create custom pattern-matching logic. Instead of matching on data constructors (like Some or None), you can define how data is decomposed, labeled, or transformed during pattern matching.

There are two main types:

• Complete active patterns, which cover all possible inputs.
• Partial active patterns, which may not match all inputs.

 Why Use Active Patterns?-

• To encapsulate complex matching logic
• To increase code readability
• To make pattern matching more expressive