DigitIntoNumberCase.sh

#!/bin/bash

function convertDigitIntoWord(){
	case "$digit" in
		"0")
			echo "Zero"
			;;
		"1")
			echo "One"
			;;
		"2")
			echo "Two"
			;;
		"3")
			echo "Three"
			;;
		"4")
			echo "Four"
			;;
		"5")
			echo "Five"
			;;
		"6")
			echo "Six"
			;;
		"7")
			echo "Seven"
			;;
		"8")
			echo "Eight"
			;;
		"9")
			echo "Nine"
			;;
		*)
			echo "Not a valid input"
			exit 1
			;;
	esac
}
read -p "Enter single Digit(0-9):" digit
convertDigitIntoWord digit