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1)
private static int number_of_participants()
    {          
        int tmp;
        int num;

        Console.WriteLine("enter no of students");
        num = Convert.ToInt32(Console.ReadLine());

        if (num < 1 || num > 9)
        {
            Console.WriteLine("this is not number. enter valid num");
            num = Convert.ToInt32(Console.ReadLine());
        }
        else if (int.TryParse(Console.ReadLine(), out tmp))
        {
            Console.WriteLine("Enter no of students between 0 t0 9: ");
            tmp = Convert.ToInt32(Console.ReadLine());

        }

        Console.WriteLine("Invalid: enter number of students");
        num = Convert.ToInt32(Console.ReadLine());

        return num;
    }
Step 2/3
2) 
import random



number = random.randrange(1, 10)

guess = 0

count = 0



while guess != number and guess != "exit":

    guess = input("Please guess a number between 1 and 9. When you want to end the game print 'exit': ")



    if guess == "exit":

        print("Game Over")

        break



    guess = int(guess)

    count += 1

    if guess not in range(1, 10):

        print("You have to guess a number between 1 and 9!")

    elif guess < number:

        print("You've guessed too low!")

    elif guess > number:

        print("You've guessed too high!")

    else:

        if count == 1:

            print("You rock! You've got it at the first try!")

        elif count <= 3:

            print("Well done! You've got it in just {} tries".format(count))

        elif count > 3:

            print("You've got it! It took you {} tries!".format(count))
Step 3/3

//Declare and initialize LED pin variables
int LED_1 = 2;
int LED_2 = 3;
int LED_3 = 4;

//this variable will hold a random number generated by the random() function
long randomNumber;

//Set up - this is where you get things "set-up". It will only run once
void setup() {
  
  //setup serial communications through the USB
  Serial.begin(9600);
  
  //Let's print a start messgae to the serial monitor when a new sequence of random numbers starts
  Serial.println("Starting new Random Number Sequence");

  //set the LED pins as outputs
  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
  pinMode(LED_3, OUTPUT);
      
  //Let's make it more random
  randomSeed(analogRead(A0));   
      
}//close setup

//The loop() runs over and over again
void loop() {
  
  //generate a random number
  randomNumber = random(2,5);
  
  //display the random number on the serial monitor
  Serial.print("The Random Number is = ");
  Serial.println(randomNumber);
Final answer


//Declare and initialize LED pin variables
int LED_1 = 2;
int LED_2 = 3;
int LED_3 = 4;

//this variable will hold a random number generated by the random() function
long randomNumber;

//Set up - this is where you get things "set-up". It will only run once
void setup() {
  
  //setup serial communications through the USB
  Serial.begin(9600);
  
  //Let's print a start messgae to the serial monitor when a new sequence of random numbers starts
  Serial.println("Starting new Random Number Sequence");

  //set the LED pins as outputs
  pinMode(LED_1, OUTPUT);
  pinMode(LED_2, OUTPUT);
  pinMode(LED_3, OUTPUT);
      
  //Let's make it more random
  randomSeed(analogRead(A0));   
      
}//close setup

//The loop() runs over and over again1

private static int number_of_participants()
    {          
        int tmp;
        int num;

        Console.WriteLine("enter no of students");
        num = Convert.ToInt32(Console.ReadLine());

        if (num < 1 || num > 9)
        {
            Console.WriteLine("this is not number. enter valid num");
            num = Convert.ToInt32(Console.ReadLine());
        }
        else if (int.TryParse(Console.ReadLine(), out tmp))
        {
            Console.WriteLine("Enter no of students between 0 t0 9: ");
            tmp = Convert.ToInt32(Console.ReadLine());

        }

        Console.WriteLine("Invalid: enter number of students");
        num = Convert.ToInt32(Console.ReadLine());

        return num;
    }
void loop() {
  
  //generate a random number
  randomNumber = random(2,5);
  
  //display the random number on the serial monitor
  Serial.print("The Random Number is = ");
  Serial.println(randomNumber);

Hope the code is helpful... Thank you









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