Errors

Go doesn't support throw, try, catch and other common error handling structures. Here, we use error package to build possible errors as a returning parameter in functions

import "errors"
 
// Function that contain a logic that can cause a possible exception flow
func firstLetter(text string) (string, error) {
    if len(text) < 1 {
        return nil, errors.New("Parameter text is empty")
    }
    return string(text[0]), nil
}
 
a, errorA := firstLetter("Wow")
a // "W"
errorA // nil
 
b, errorB := firstLetter("")
b // nil
errorB // Error("Parameter text is empty")

Errors

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