public class NonIntersectBlks
{
    public static void main(String[] args)
    { // Block 1
        double sum;

        sum = 0;
        for ( int i = 1; i <= 4; i++ )              // var i in block is int
        { // Block 2                       
           sum = sum + i;                  
        }                                  

        sum = 0;
        for ( double i = 1; i <= 1.4; i = i + 0.1 ) // var i in block is double
        { // Block 3                                 
           sum = sum + i;                            
        }                                            
    }
}