function zode64() { // Euclidean distance from origin to my home village coordinates var euc = Math.sqrt(Math.pow(53.8192, 2) + Math.pow(1.2545, 2)); // Base 64 encoded ASCII string of euclidean distance var eucEncod = btoa(euc); // eucEncod == "NTMuODMzODE4OTE0MjI5" var eucEncodSub = eucEncod.substring(7, 11).toLowerCase(); // eucEncodSub == "zode" return eucEncodSub + "64"; // append base encoding value } // zode64() == "zode64" console.log(zode64());