Mastering Go - Second Edition

The switch statement

The main reason for presenting the switch statement in this chapter is because a switch case can use regular expressions. Firstly, however, take a look at this simple switch block:

    switch asString { 
    case "1": 
        fmt.Println("One!") 
    case "0": 
        fmt.Println("Zero!") 
    default: 
        fmt.Println("Do not care!") 
    } 

The preceding switch block can differentiate between the "1" string, the "0" string, and everything else (default).

Having a match all remaining cases case in a switch block is considered a very good practice. However, as the order of the cases in a switch block does matter, the match all remaining cases case should be put last. In Go, the name of the match all remaining cases case is default.

However, a switch statement can ...