How to handle an exception in golang?

Question

go

Good afternoon, how to handle an exception in go?
There is a code Message.Send(ActiveClients[input].websocket, string(ans.Message))
And if instead of input we substitute either a string value or a non-existent numeric value, then the program crashes. How to process it?
Thanks

Answer 1

var a =ActiveClients[input].websocket
if a!=nil {Message.Send(ActiveClients[input].websocket, string(ans.Message))}

Answer 2

Write with what message the program crashes.