Module 2

• Variables


  Named storage locations that can hold different values during program execution
• Operators


  Symbols used to perform operations on operands (values or variables)
• String Manipulation


  Techniques used to modify and extract information from strings
• C#


  • Object-oriented programming language
  • Program consists of various objects that interact with each other via actions
  • Actions that an object may take are called methods
  • Objects of the same kind are said to have the same type or be in the same class
• Basic Syntax


  1. using System;

  2. namespace Example Program;

  3. public class Example

  4. public static void Main()
• namespace


  Keyword used to name your project/program
• class


  Keyword used for declaring a class, which is a collection of methods, events, variables, objects and more
• method


  A block of code that defines how an action is performed, associated with a class or object
• comments


  Used for explaining code, ignored by the compiler
• Identifiers


  • Names used to identify a class, variable, function, or any other user-defined item
  • Must begin with a letter, can be followed by letters, digits, or underscores
  • Cannot contain embedded spaces or symbols (except underscore)
• Casting


  Assigning a value of one data type to another type
• Arithmetic Operators


  Perform mathematical calculations (+, -, *, /, %, ++, --)
• Relational Operators


  Compare two values, resulting in a boolean value (true or false) (==, !=, >, <, >=, <=)
• Logical Operators


  Combine and evaluate boolean expressions (&&, ||, !)
• Assignment Operators


  Assign values to variables (=, +=, -=, *=, /=, %=)