Val

Definitions

1. A keyword in Kotlin, Scala, and Swift that declares an immutable variable binding — once assigned, it cannot be reassigned. The counterpart of var (mutable). Prefer val by default for safer, more predictable code.

   In plain English: A way to declare a variable that can't be changed after it's set, encouraging you to write code that's easier to reason about.

   Example: "Use val unless you have a specific reason to mutate. Immutability by default prevents entire classes of bugs."

Related Terms

• Akka
• Case Class
• Coroutine
• Data Class
• Extension Function
• Implicit
• Implicit Typing
• Jetpack Compose
• Object Lock