package main func main() { // you can cast between numbers i.e. integers of various sizes and floating point numbers var i1 int32 = 3 var i2 int = int(i1) // we must explicitly cast from int32 to int var f float64 = float64(i1) s := "string" // we can cast between string and []byte and vice-versa // note that unless optimizted by the compiler, this involves allocation var d []byte = []byte(s) _, _, _ = i2, f, d // silence compiler error about unused variables }