What Is New in Go 1.22

Go 1.22 introduces native range loops over integers and enhanced ServeMux pattern matching for cleaner HTTP routing. Use the new integer range syntax to iterate from 0 to n-1 without explicit counters, and leverage ServeMux's wildcard and prefix matching for flexible endpoint definitions.

// Range over integers (0 to 9)
for i := range 10 {
    fmt.Println(i)
}

// ServeMux with wildcard and prefix matching
mux := http.NewServeMux()
mux.HandleFunc("/api/v{version}", handleAPI)
mux.HandleFunc("/static/", handleStatic)

Go 1.22 makes writing loops and web servers easier by letting you count numbers directly in your code and match web addresses with wildcards. Think of it like upgrading from a manual counter to an automatic one, and from rigid address matching to flexible pattern matching. This saves typing and reduces errors in common tasks.