This document provides an overview of key concepts in C Sharp (C#) programming including defining variables of different data types, getting and displaying user input, determining if a number is odd or even, using switch statements, loops, and logic, comparing strings, clearing the screen, and exiting a program. It covers data types, basic input/output, conditional logic, string comparison methods, and normal and graceful exit handling.

1. C Sharp (C#)
By:
Ralph W.

2. Summary

Defining variables

Getting user input

Displaying user input

Finding odd or even numbers

Switch cases, looping, and logic statements

Comparing sub string within a another string

Clearing screen

Quitting Program

3. Defining variables

Byte – byte, 8 width, 0 -255

Signed byte – sbyte, 8 width, -127 to 127

integer – int, 32 width,
-2147483648 to 2127483647

String – string,

long, short, char, object, decimal, bool,
double, float, ulong, ushort,

ex: int value;

4. Getting user input

valueStr = Console.ReadLine()

5. Displaying user input

Console.WriteLine(valueStr);

6. Finding odd or even numbers

if(value % 2 != 0), odd

if(value % 2 == 0), even

7. Switches, loops, and logic

Switch ( caseNumber)
{ case 0: break; default: }

Do { // do something } while( condition);

While (condition) { // do something}

If (condition) { } else { }

8. Comparing strings

Compare String
String.Compare(str1, str2, true)
− True to ignore case during comparison,
otherwise false.

9. Clearing screen

Console.Clear();

10. Exiting Program

Normal exit
− Run a tight loop for the display
− Allow the user to select exit criteria
− Put up a warning message
− Allow the program to exit naturally

Graceful exit with exceptions
− If you want to get fancy you can catch
exceptions and exit gracefully

11. Extras

Structures

Classes

Linked Lists

Converting strings to integers