O'Reilly logo

Haskell Cookbook by Yogesh Sajanikar

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Using Maybe

Maybe is a sum type very often used to indicate a NULL value or nothing. In fact, it is a very type-safe way of representing a NULL value. Explicitly saying that we have either a value or nothing makes our life simpler during programming steps, which can fail, and we may not want to continue.

In this recipe, you will learn to use the Maybe data type. 

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required