When you say "switch <value>", it matches the "case" statements based on if the value after "case" is equal to <value>. So, if you say

    const P = 3.141
    switch 3.141 {
       case P: 
          fmt.Println("This prints") 
    }

When no value is specified after "switch", the value of "true" is implied, which is why you can do:

    switch {
       case a && b: ..
       case something():
    }

No idea as I wouldn't do it :) (sorry - cop out that)