Literal types will let you define a type as an enumeration of possible values. This is useful in the use cases when a variable or function call can only take one out of a small set of possible values, for example, like days in a week (Saturday, Sunday, etc.) or HTTP request methods (GET, POST, DELETE, etc.). 

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The type system can help you save time preventing errors, find quickly the function you need, instead of looking for it in the documentation, and let you code using types to define different behaviors for functions. In this post, I’ll show you how the DataWeave type system can help you develop in a more efficient and clear way.

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