?? Mastering Kotlin Variables – What You Need to Know

In Kotlin, understanding how variables work can save you from confusion. Here’s a quick rundown of the most important keywords:

• val: Immutable. Once assigned, it can’t be changed.

Example: val name = "John" You can't change name after this.

• var: Mutable. It can be reassigned freely.

Example: var age = 25 You can change age later: age = 26.

• const: Compile-time constant, known as compile-time.

Example: const val MAX_AGE = 100 Used for constants known at compile-time, like MAX_AGE.

• lateinit: Initializes the variable later, great for non-nullable types.

Example: lateinit var city: String You can initialize city later: city = "New York".

• lazy: Value initialized only when accessed, perfect for heavy operations.

Example: val file by lazy { loadFile() } loadFile() is called only when file is accessed for the first time.

These tools will help you write cleaner, more efficient code. Which one do you use the most?

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