Implicit typing with var keyword in C Sharp (C#) - Mini Project: Build & Apply

Implicit typing with var keyword

📖 Scenario: You are working on a small program that stores information about a book. You want to use the var keyword to let the computer figure out the type automatically.

🎯 Goal: Learn how to use the var keyword to create variables with implicit typing in C#.

📋 What You'll Learn

Create variables using the var keyword

Assign values to these variables so the compiler can infer their types

Print the values to the console

💡 Why This Matters

🌍 Real World

Implicit typing with <code>var</code> helps write cleaner and shorter code when the type is obvious from the value.

💼 Career

Many professional C# developers use <code>var</code> to improve code readability and maintainability.

1

Create variables with explicit types

Create a variable called title of type string and set it to "The Great Gatsby". Create a variable called pages of type int and set it to 180.

C Sharp (C#)

// Create a string variable called title and set it to "The Great Gatsby"
// Create an int variable called pages and set it to 180

Need a hint?

Use string for text and int for whole numbers.

2

Create variables using var keyword

Replace the explicit types with the var keyword for both title and pages variables, keeping the same values.

C Sharp (C#)

var title = "The Great Gatsby";
var pages = 180;
// Your code here

Need a hint?

Use var instead of explicit types to let the compiler infer the type.

3

Add a new variable with var

Create a new variable called price using var and set it to 15.99 (a decimal number).

C Sharp (C#)

var title = "The Great Gatsby";
var pages = 180;
// Create a var variable called price and set it to 15.99

Need a hint?

Use var and assign 15.99 to create the price variable.

4

Print all variables to the console

Use Console.WriteLine to print the values of title, pages, and price variables each on a new line.

C Sharp (C#)

var title = "The Great Gatsby";
var pages = 180;
var price = 15.99;
// Print title, pages, and price each on a new line

Need a hint?

Use Console.WriteLine three times, once for each variable.