Explain the difference between val and var in Kotlin.

Kotlin uses two keywords for variable declaration:\n\n1. val (Value - Immutable)\n• Read-only reference, cannot be reassigned\n• Similar to final in Java\n• Example:\n\nval name = "John"\n// name = "Jane" // Compilation error\n\n\n2. var (Variable - Mutable)\n• Can be reassigned after initialization\n• Value can change during execution\n• Example:\n\nvar age = 25\nage = 26 // OK\n\n\n3. Important Notes\n• val makes the reference immutable, not the object\n• Example:\n\nval list = mutableListOf(1, 2, 3)\nlist.add(4) // OK - object is mutable\n// list = mutableListOf(5, 6) // Error - reference immutable\n\n\n4. Best Practice\n• Use val by default for immutability\n• Use var only when reassignment is needed\n• Improves code safety and readability