Heads up! To view this whole video, sign in with your Courses account or enroll in your free 7-day trial. Sign In Enroll

C# Basics

Preview

Start a free Courses trial
to watch this video

Sign up for Treehouse

Course Overview

2:37 with Jay McGavren

In this course, we're going to use C# to create a shopping program for the Kitty Cuisine Cat Food Store.

In this course, we're going to use C# to create a shopping program for the Kitty Cuisine Cat Food Store.

Here's our checklist of features our program is going to need.

  • Display welcome message
  • Ask for quantity
  • Calculate total
  • Discount for large orders

There are several areas of the C# language that we'll need to cover in order to implement these features.

  • Variables will let us store data, and types will help prevent us from using that data incorrectly.
  • Methods will let us break our code into smaller, more maintainable chunks.
  • We'll use strings to hold text to show the user.
  • Numeric types will let us store numbers.
  • We'll also need to multiply those numbers, for which we'll need to understand math operations.
  • And lastly we'll need to apply discounts if a certain quantity is ordered, for which we'll need if statements.

Related Discussions

Have questions about this video? Start a discussion with the community and Treehouse staff.

Sign up

    Related Discussions

    Have questions about this video? Start a discussion with the community and Treehouse staff.

    Sign up

    In this course we're going to use C# to create a shopping program for 0:00
    the Kitty Cuisine cat food store. 0:03
    And this cat food sure is popular. 0:06
    People often buy cans of it in groups of 50, 100, or 0:08
    more, even though they cost $2 a can. 0:11
    The store needs us to write a program that lets a user 0:14
    type in the number of cans they want to buy. 0:17
    Then it should multiply that number to get the total price and 0:20
    report the total to the user. 0:23
    They're also thinking that they may need to offer discounts if a user is purchasing 0:25
    a large quantity. 0:29
    Sound complicated? 0:30
    Don't worry, everything we need to solve this problem is built in to C# and 0:32
    the .Net framework. 0:36
    We'll learn how to output text to the terminal and 0:37
    store values the user types in. 0:40
    We'll learn how to do arithmetic in C#. 0:43
    And we'll learn how to write C# methods that let us break the problem into small 0:45
    chunks. 0:50
    Let me run my code to give you a preview of what the finished shopping program will 0:51
    look like, dotnet run. 0:55
    It needs to greet the user with the message, Welcome to the cat food store! 0:58
    Then it needs to ask them how many cans they're ordering. 1:02
    It should wait for them to type in a quantity and press Enter. 1:05
    The program will need to store whatever quantity the user enters in 1:10
    the computer's memory. 1:13
    Each can costs $2. 1:15
    So the program should multiple the quantity by two to get the total cost, 1:17
    then it should print out a message that includes the quantity the user typed 1:21
    in and the total cost. 1:26
    And one more thing, the store wants to offer discounts for 1:27
    ordering a lot of cans at once. 1:30
    So if a user orders 50 or more cans, let me rerun the program and 1:32
    enter 50, they should only be charged $1.75 per can. 1:37
    And if a user orders 100 or more cans, they should only be charged $1.50 per can. 1:43
    So here's our checklist of features our program is going to need. 1:50
    Over the rest of the course we'll learn the C# concepts we need 1:54
    to implement each one. 1:57
    Then we'll cross that feature off our list when we're done. 1:59
    There are several areas of the C# language that we'll need to cover in order to 2:02
    implement these features. 2:06
    Variables will let us store data, and 2:08
    types will help prevent us from using that data incorrectly. 2:10
    Methods will let us break our code into smaller, more maintainable chunks. 2:13
    We'll use strings to hold text to show the user. 2:18
    Numeric types will let us store numbers. 2:21
    We'll also need to multiply those numbers, for 2:24
    which we'll need to understand math operations. 2:26
    And lastly, we'll need to apply discounts if a certain quantity is ordered, for 2:29
    which we'll need if statements. 2:34

    You need to sign up for Treehouse in order to download course files.

    Sign up

      You need to sign up for Treehouse in order to set up Workspace

      Sign up