Kotlin學習筆記(8) Declares a variable without initialization.

Kotlin學習筆記(8) Declares a variable without initialization.

fun main() {
 
    val d: Int   // 1
println(d) // 3
 
//d: Int  // 1
//println(e)  // 2
//Target platform: JVMRunning on kotlin v. 1.3.31
//Declares a variable without initialization.
//An attempt to use the variable causes a compiler error: Variable 'd' must be initialized.
 
}


Variable 'd' must be initialized

1. Declares a variable without initialization.
2. An attempt to use the variable causes a compiler error: Variable 'e' must be initialized.