Echo JS 0.11.0

Hi, trying to work out the code for the co-ordinates at the beginning of drawing a circle, the end of having drawn the circle as well as the radius of the circle in leaflet.js and want to print the results to the console. So far I have the following but cannot work out how to do precisely the beginning, end and radius of circle:
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map.on('draw:created', function (e) {
    var type = e.layerType;
    var layer = e.layer;
    var latLngs;

    if (type === 'circle') {
       latLngs = layer.getLatLng();
       console.log("Coordinates: " + latLngs.toString());
    }
    else
       latLngs = layer.getLatLngs(); // Returns an array of the points in the path.

    // process latLngs as you see fit and then save
})
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Any ideas how to do this?