Coding question

1-numberguess.go

package main

import "fmt"
import "strings"

func main() {
	fmt.Println("Think of a number from 1 to 100...")
	currGuess := 50

	for {
		var response string
		fmt.Printf("I guess %d - am I too [h]igh, too [l]ow, or [r]ight on? ", currGuess)
		fmt.Scanln(&response)
		if strings.HasPrefix(response, "h") {
			currGuess--
		} else if strings.HasPrefix(response, "l") {
			currGuess++
		} else if strings.HasPrefix(response, "r") {
			break
		}
	}

	fmt.Printf("Got it!  Your number is %v\n", currGuess)
}

2-numberguess-optimized.go

package main

import "fmt"
import "strings"

func main() {
	fmt.Println("Think of a number from 1 to 100...")
	currGuess := 50
	max := 100
	min := 0

	for {
		var response string
		fmt.Printf("I guess %d - am I too [h]igh, too [l]ow, or [r]ight on? ", currGuess)
		fmt.Scanln(&response)
		if strings.HasPrefix(response, "h") {
			max = currGuess
		} else if strings.HasPrefix(response, "l") {
			min = currGuess
		} else if strings.HasPrefix(response, "r") {
			break
		}
		currGuess = min + (max-min)/2
	}

	fmt.Printf("Got it!  Your number is %v\n", currGuess)
}