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Solution Review: Map the Days

Solution Review: Map the Days

This lesson discusses the solution to the challenge given in the previous lesson.

We'll cover the following...
Go (1.6.2)
package main
import (
	"fmt"
)
var Days = map[int]string{
	1:"Monday", 
	2:"Tuesday",
	3: "Wednesday",
	4: "Thursday",
	5: "Friday",
	6: "Saturday",
	7: "Sunday"} 
func findDay(n int) string {
	val,isPresent := (Days[n])
	if isPresent{		// what if key is not present
		return val
	}else{
		return "Wrong Key"}	// return wrong key if invalid key
}
func main() {
	n := 4
	fmt.Println(n,":",findDay(n))
	n = 0
	fmt.Println(n,":",findDay(n))
}

In the above code, outside main at line 6, we make a map Days. The declaration of Days shows that its keys will be of int type and values associated with its keys will be of string type. Initialization is as follows:

  • Key 1 is given Monday as a value.
  • Key 2 is given Tuesday as a value.
  • Key 3 is given Wednesday as a value.
  • Key 4 is
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