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