Driver code
let x1 = 4 , y1 = 3 ; let x2 = 0 , y2 = 1 ; let r1 = 2 , r2 = 4 ; let f = orthogonality ( x1 , y1 , x2 , y2 , r1 , r2 ) ; if ( f ) document . write ( " " ) ; else document . write ( " " ) ;