package main import ( "fmt" ) func printVariableType(v interface{}) { switch v.(type) { case string: fmt.Printf("v is of type 'string'\n") case int: fmt.Printf("v is of type 'int'\n") default: // generic fallback fmt.Printf("v is of type '%T'\n", v) } } func main() { printVariableType("string") // string printVariableType(5) // int printVariableType(int32(5)) // int32 }