Introduction
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Welcome to the fourth lesson of the second module.
In this lesson you’ll learn about the concept of null values and how to work with them in Kotlin. The null value is a special value that represents the absence of a value. You’ll also discover the differences between nullable, non-nullable and platform types. They are essential concepts in Kotlin, so it’s important to understand them well. Finally, you’ll learn how to implement null checks and how to use null-related operators including the safe call and the Elvis operators.
This lesson covers the following topics:
- how to check for null in conditions
- safe casts and null operators