Go Switch fallthrough

Switch cases in go can use fallthrough keyword to fall into next case without checking it’s condition if the current case has fallthrough statement at the end.

For example:

    i := 142

	switch {
	case i > 100:
		fmt.Print("big ")
		fallthrough
	case i > 0:
		fmt.Print("positive ")
		fallthrough
	default:
		fmt.Print("number")
	}

The output is,

big positive number

“fallthrough” can be used in scenario where the block of both cases are same. It avoids duplication of code.

go  note 

See also