using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("FOR LOOPS ");

        //A FOR loop has three parts

        // The first part initiliases the counter typically to 0. This will run run during the part run of the loop

        //The second part is the condition and it check the value of the counter against a number

        //If true then it will run the code

        //The final part of the loop is the incrementer which will increase the value of the counter by a specified number i.e. by 1

        //CHALLENGE 1: ADAPT THE CODE TO PRINT ODD NUMBERS BETWEEN 1 and 10

        //CHALLENGE 2: ADAPT THE CODE TO PRINT THE EVEN NUMBERS BETWEEN 1 AND 10

        //CHALLENGE 3: ADAPT THE CODE TO PRINT NUMBERS BETWEEN 1 AND 10 THAT ARE EXACTLY DIVISIBLE BY 3 i.e. leaves no remainder  6%3 = 0

        //CHALLENGE 4: ADAPT THE CODE TO PRINT NUMBERS 1 to 10 IN REVERSE ORDER i.e. 10,9,8.....2,1

        //CHALLENGE 5: ADAPT THE CODE TO PRINT ODD NUMBERS BETWEEN 1 and 10 IN REVERSE ORDER

        //CHALLENGE 6: WRITE THE CODE TO ALLOW A USER 5 ATTEMPTS TO ENTER THE CORRECT USERNAME AND PASSWORD. 

        //             IF THEY DONT GET BOTH RIGHT IN 5 ATTEMPTS, THE PROGRAM LOCKS THEM OUT

        //CHALLENGE 7: WRITE THE CODE TO ALLOW THE USER 5 ATTEMPTS TO GUESS A NUMBER (MAX: 10) (EITHER RANDOMLY GENERATED or SET WITHIN THE CODE BY THE PERSON WRITING THE CODE)

        //             AFTER 5 ATTEMPTS THE PROGRAM WILL TERMINATE

        //CHALLENGE 8: ADAPT THE CODE TO INFORM THE USER HOW MANY UNSUCESSFUL ATTEMPTS THEY HAVE HAD AND HOW MANY THEY HAVE REMAINING

        //CHALLENGE 1: ADAPT THE CODE TO PRINT ODD NUMBERS BETWEEN 1 and 10

        Console.WriteLine("\nCHALLENGE 1");

        for(int i=1;i<=10;i=i+2) 

        {

            Console.WriteLine(i);

        }

        Console.WriteLine("This is the end of the challenge 1");

        //CHALLENGE 2: ADAPT THE CODE TO PRINT THE EVEN NUMBERS BETWEEN 1 AND 10

        Console.WriteLine("\nCHALLENGE 2");

        for(int i=2;i<=10;i=i+2) 

        {

            Console.WriteLine(i);

        }

        Console.WriteLine("This is the end of the challenge 2");

        //CHALLENGE 3: ADAPT THE CODE TO PRINT NUMBERS BETWEEN 1 AND 10 THAT ARE EXACTLY DIVISIBLE BY 3 i.e. leaves no remainder  6%3 = 0

        Console.WriteLine("\nCHALLENGE 3");

        for(int i=1;i<=10;i++) 

        {

            if(i%3==0)

            {

                Console.WriteLine(i);

            }

        }

        //CHALLENGE 4: ADAPT THE CODE TO PRINT NUMBERS 1 to 10 IN REVERSE ORDER i.e. 10,9,8.....2,1

        Console.WriteLine("\nCHALLENGE 4");

        for(int i=10;i>0;i--) 

        {

            Console.WriteLine(i);

        }

        Console.WriteLine("This is the end of the challenge 4");

        //CHALLENGE 5: ADAPT THE CODE TO PRINT ODD NUMBERS BETWEEN 1 and 10 IN REVERSE ORDER

        Console.WriteLine("\nCHALLENGE 4");

        for(int i=9;i>0;i=i-2) 

        {

            Console.WriteLine(i);

        }

        Console.WriteLine("This is the end of the challenge 4");

​

        //CHALLENGE 6: WRITE THE CODE TO ALLOW A USER 5 ATTEMPTS TO ENTER THE CORRECT USERNAME AND PASSWORD. 

        //             IF THEY DONT GET BOTH RIGHT IN 5 ATTEMPTS, THE PROGRAM LOCKS THEM OUT

        Console.WriteLine("CHALLENGE 6");

        string username, password;

        for(int i=0;i<5;i++)

        {

            Console.WriteLine("Please enter your username");

            username = Console.ReadLine();

            Console.WriteLine("Please enter your password");

            password = Console.ReadLine();

            if((username=="errol")&&(password=="martin"))

            {

                Console.WriteLine("Well done you have successfully logged in");

            }

            else

            {

                Console.WriteLine("Hard cheese! Please try again");

            }

​

        }

        Console.WriteLine("You total loser. You failed to log in successfully after 5 attempts. You have been terminated");

        Console.WriteLine("End of Challenge 6");

}

}