Same Name used in Several Loops

Other for statements might use the same identifier (the same name) in declaring their loop control variable, but each of these is a different variable which can be seen only by its own loop. Here is an example:

class sameName
{
  public static void main ( String[] args )
  {
    int sumEven = 0;
    int sumOdd  = 0;

    for ( int j = 0;  j < 8; j=j+2 )      // a variable named "j"
        sumEven = sumEven + j;
    System.out.println( "The sum of evens is: " + sumEven ); 

    for ( int j = 1;  j < 8; j=j+2 )      // a different variable named "j"
        sumOdd  = sumOdd + j;
    System.out.println( "The sum of odds is: " + sumOdd );
  } 
}

The two loops work correctly, and don't interfere with each other, even though each one has its own variable named j.

class sameName
{
  public static void main ( String[] args )
  {
    int sumEven = 0;
    int sumOdd  = 0;

    for ( int j = 0;  j < 8; j=j+2 )
        sumEven = sumEven + j;

    System.out.println( "The sum of evens is: " + sumEven ); 

    for ( j = 1;  j < 8; j=j+2 )      // Notice the change in this line
        sumOdd  = sumOdd + j;                     

    System.out.println( "The sum of odds is: " + sumOdd );
  } 
}