无法在for循环外打印变量

Question

Why can not I print the value of j in the last statement although the variable j declared outside the for loop as a local variable?

package practicejava;

public class Query {

    public static void main(String[] args) throws java.io.IOException {
      int j;
      for(int i=1;i<=5;i++) {   
          j=i;
          System.out.println(j);
      } 
      System.out.println("j="+j);
    }
}

Answer 1

The compilation error is

The local variable j may not have been initialized

As the compiler complains, you just need to initialize the variable before using it :

int j = 0;

This will resolve the compilation error.