ICSE Java Programming String Edit 2018 Q6

Write a program to accept a string in lower case and change the first letter of every word to upper case.
Display the new string.
Sample input: we are in cyber world.
Sample output: We Are In Cyber World.

ENTER A STRING IN LOWER CASE:

 flag = False

while (flag == False):

    msg = str(input("Enter a string in lower case:"))

    if(msg.islower() == False):

        print("Every character must be in lower case, try again:")

        flag = False

    else:

        flag = True

outputmsg = []

outputmsg.append(msg[0].upper())

for k in range (1,len(msg)):

    if (msg[k-1] == ' '):

        outputmsg.append(msg[k].upper())

    else:

        outputmsg.append(msg[k])

string = ""

for i in range (len(outputmsg)):

    string += outputmsg[i]

print(string)

 import java.util.*;

public class ICSEJava {

    public static void main(String[] args) {

        String input;

        boolean flag;

        char[] output;

        Scanner in = new Scanner(System.in);

        do {

            System.out.println("Enter a string in lower case:");

            input = in.nextLine();

            flag = false;

            for (int i = 0; i < input.length(); i++) {

                if (input.charAt(i) >= 65 && input.charAt(i) <= 90) {

                    System.out.println("Every character must be in lower case, try again:");

                    flag = true;

                    break;

                }

            }

        } while (flag);

        in.close();

        output = new char[input.length()];

        output[0] = Character.toUpperCase(input.charAt(0));

        for (int k = 1; k < input.length(); k++) {

            if (input.charAt(k) == ' ') {

                output[k] = (input.charAt(k));

                output[k + 1] = Character.toUpperCase(input.charAt(k + 1));

                k += 1;

            } else

                output[k] = input.charAt(k);

        }

        for (int j = 0; j < input.length(); j++)

            System.out.print(output[j]);

    }

}