// For more tutorials: https://blog.learngoprogramming.com // // Copyright © 2018 Inanc Gumus // Learn Go Programming Course // License: https://creativecommons.org/licenses/by-nc-sa/4.0/ // package main import ( "fmt" "time" ) func main() { // hours's type is time.Duration // but later's type was int // now, `later` is typeless // // time.Duration's underlying type is int64 // and, `later` is numeric typeless value // so, they can be multiplied const later = 10 hours, _ := time.ParseDuration("1h") fmt.Printf("%s later...\n", hours*later) }