Podcast
Questions and Answers
How is a variable declared in C#?
How is a variable declared in C#?
- Using the data type and a name (correct)
- Using the `var` keyword
- Using the `const` keyword
- Using the `let` keyword
What is the purpose of assigning a visibility modifier to a variable in C#?
What is the purpose of assigning a visibility modifier to a variable in C#?
- To initialize the variable with a default value
- To make the variable accessible from outside the current class
- To declare the variable as a constant
- To control how the variable can be accessed within the code (correct)
What is the purpose of the Console.ReadLine() method in the example code?
What is the purpose of the Console.ReadLine() method in the example code?
- To delay the program execution
- To print a message to the console
- To read user input from the console (correct)
- To clear the console screen
What is the purpose of the + operator in the example code?
What is the purpose of the + operator in the example code?
What is the main purpose of the using System; statement in the example code?
What is the main purpose of the using System; statement in the example code?
What is the purpose of the Main() method in the example code?
What is the purpose of the Main() method in the example code?
What is the purpose of the string data type in the example code?
What is the purpose of the string data type in the example code?
What is the purpose of the Console.WriteLine() method in the example code?
What is the purpose of the Console.WriteLine() method in the example code?
What is the purpose of the namespace keyword in the example code?
What is the purpose of the namespace keyword in the example code?
What is the purpose of the class keyword in the example code?
What is the purpose of the class keyword in the example code?
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Study Notes
Visual Programming Using C#
- C# code structure includes
usingdirectives,namespace,class, andMainmethod.
Hello World Explained
- The
usingkeyword imports a namespace, a collection of classes. - Namespaces bring functionality and are often created by the IDE (Integrated Development Environment).
- In a new C# project, 5 namespaces are imported:
System,System.Collections.Generic,System.Linq,System.Text, andSystem.Threading.Tasks.
Namespace vs Class
- A namespace is a collection of classes, while a class is a part of a namespace.
- In the example, the
ConsoleApp1namespace is the main namespace for the application.
The Basics: Variables
- In C#, variables are declared with their data type, followed by their name.
- Variables can be assigned a value when declared or later in the code.
- Variables can have visibility modifiers (e.g.,
private) when used as class members.
Adding Two Numbers Program
- Not mentioned in the provided text.
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