Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Identifiers | Getting Started
C# Basics
course content

Course Content

C# Basics

C# Basics

1. Getting Started
2. Dealing with Data Types
3. Control Structures
4. Loops
5. Arrays
6. Methods

Identifiers

In C#, all variables must have unique names. These unique names are called identifiers as they identify the different variables.

There are certain rules for naming variables. Following are the rules that one must keep in mind when naming a variable:

  • Variable names can contain lowercase letters (a-z), uppercase letters (A-Z), numbers (0-9) and the underscore symbol (_). Any other character is invalid;
  • Variable names cannot begin with a number. They can begin with a letter or an underscore; Variable names cannot contain whitespace (space);
  • A variable name cannot be the same as a reserved word. Reserved words are predefined keywords that have a specific meaning or function in a programming language. Some examples of reserved words are: var, namespace, class, internal, etc;
  • Variable names are case sensitive, therefore the name myVar does not conflict with MyVar.

Which of the following variable names are INVALID ?

Select a few correct answers

Everything was clear?

Section 1. Chapter 8
We're sorry to hear that something went wrong. What happened?
some-alt