Golang Grammar Summary (18): Handling Exceptions

This is a creation in Article, where the information may have evolved or changed.

• The go language does not provide the exception and capture mechanism of try catch like other languages, which can be replaced by defer, panic, recover.
  
• The defer statement or function executes after the current function is executed, then executes after the defer, and then defer executes first. Defer is also able to execute when a serious error occurs in the program. A bit like destructors for other languages
  
• Call panic to create an exception
  
• Call recover to get exception information
  

func main(){f1()f2()f3()} func f1(){fmt.Println("f1")}func f2(){defer func   ()    {   if   err  :=  recover   ();  err  !=  nil   { fmt.Println("catch the exception")} }()panic("wa ha ha ha ha ~~~")}func f3(){fmt.Println("f3")}

Output: F1catch the exceptionf3