Kotlin學習筆記(9) Declares a variable without initialization.

Kotlin學習筆記(9) Declares a variable without initialization.

fun main() {
      val d: Int  // 1

      if (someCondition()) {
          d = 1   // 2
      } else {
          d = 2   // 2
      }

      println(d) // 3

}

輸出畫面
1

1. Declares a variable without initialization.
2. Initializes the variable with different values depending on some condition.
3. Reading the variable is possible because it's already been initialized.