Variable scope in a for-loop initialization statement Java

Asked Oct 02 '20 at 20:17

Active Oct 02 '20 at 20:48

Viewed 51 times

In Java, what is variable scope in for-loop initialization if the variable declared outside of for loop? I have two cases below:

// Invalid, unknown i
      private int i  = 0;
      for (i = 0; i < 10; i++) {
        
      }

  private int i  = 0;
  void foo() {
    for (i = 0; i < 10; i++) {
      
    }
  }

In the second case, why i can be accessed?

edited Oct 02 '20 at 20:48

asked Oct 02 '20 at 20:17

icelemon

Why are you trying to declare a variable `private` inside a method? – UnholySheep Oct 02 '20 at 20:18
The scope of the variable "cares" only about where it's defined, not whether or not it's used in a loop or where that loop is. – Louis Wasserman Oct 02 '20 at 20:24
In the second case, why i can be accessed? – icelemon Oct 02 '20 at 20:49
In the second case, i is an instance variable. In the first case, it shouldn't compile. – NomadMaker Oct 02 '20 at 20:54

0 Answers0