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This article mainly explains the "Go error handling case analysis", the content of the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "Go error handling case analysis" bar!

The Go language provides a very simple error handling mechanism through the built-in error interface.

The error type is an interface type, which is its definition:

Type error interface {Error () string}

We can generate error messages in coding by implementing the error interface type.

The function usually returns an error message in the final return value. Use errors.New to return an error message:

Func Sqrt (f float64) (float64, error) {if f < 0 {return 0, errors.New ("math: square root of negative number")} / / implementation}

In the following example, we pass a negative number when we call Sqrt, and then we get the error object of non-nil. Comparing this object with nil, the result is true, so fmt.Println (when the fmt package calls the Error method when processing error) is called to output the error. Take a look at the sample code called below:

Result, err:= Sqrt (- 1) if err! = nil {fmt.Println (err)} Thank you for your reading. The above is the content of "error handling case Analysis of Go". After the study of this article, I believe you have a deeper understanding of the error handling example analysis of Go, and the specific use still needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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