Choose Odds or Evens on Groundhog Learning

Write Welcome Message

Mon, 01 Jan 0001 00:00:00 +0000

📖 Instructions#

The first thing we’ll do is greet the player. Right now, the program displays Hello world!. The goal of this lesson is to replace that with a proper welcome message for the game.

To do that, you need to understand two things: what a string is, and how to print text to the console.

Ask Player Input

Mon, 01 Jan 0001 00:00:00 +0000

📖 Instructions#

Let’s now tackle the first step: Player chooses to play with odds or evens.

To complete it we need:

A way to ask for player input.
A way to save his choice.

Let’s start by solving step number one.

Programming languages don’t know what “odds” or “evens” means, so we use numbers to represent them: 1 for odds and 2 for evens.

To ask the player to make a choice, we need to do two things: print a message explaining what to type, and then read what they enter.

Save Player Choice

Mon, 01 Jan 0001 00:00:00 +0000

📖 Instructions#

Moving on to the second step, we need a way to save the player choice.

Right now, the program reads the player’s input but doesn’t do anything with it. We need a way to remember what the player typed so the game can use it later.

To do that, we use a variable .

A variable is like a labeled box: you give it a name, and you put a value inside. Later, you can open the box to read or change what’s in it.

Parse Player Choice

Mon, 01 Jan 0001 00:00:00 +0000

📖 Instructions#

Right now, playerChoice holds the value the player typed — but it’s stored as a string . That means the program sees it as text, not as a number.

string playerChoice = Console.ReadLine();

That matters because later we’ll need to do things with this value that only work with numbers, like comparing it to 1 or 2. Text and numbers are different types , and mixing them up leads to problems.

Show Player Choice

Mon, 01 Jan 0001 00:00:00 +0000

📖 Instructions#

Now that the player’s choice is saved as a number, we can use it to display a message confirming what they picked.

To do that, the program needs to make a decision based on the value of playerChoice. This is done with an if/else statement.

int score = 10;

if (score == 10)
{
 Console.WriteLine("You got a perfect score!");
}
else
{
 Console.WriteLine("You didn't get a perfect score.");
}

Python

score = 10

if score == 10:
 print("You got a perfect score!")
else:
 print("You didn't get a perfect score.")

JavaScript

let score = 10;

if (score === 10) {
 console.log("You got a perfect score!");
} else {
 console.log("You didn't get a perfect score.");
}

Here’s how it works: