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Find the distance between two points
groovy
distance = distance(x1, y1, x2, y2)
distance = sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))
erlang
Distance = distance({point, 34, 78}, {point, 67, -45}),
io:format("~.2f~n", [Distance]).
io:format("~.2f~n", [Distance]).
Distance = distance(point:new(34, 78), point:new(67, -45)),
io:format("~.2f~n", [Distance]).
io:format("~.2f~n", [Distance]).
