learngo/10-constants/exercises/06-no-conversions-allowed/solution/main.go

// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials  : https://learngoprogramming.com
// In-person training  : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus

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)
}