C# Variable Basics Using Temperature Conversion Fahrenheit and Celsius
Here is a brief introduction to variable within C#. We will be using temperature conversions to demonstrate variable declaration, usage, and formatting. Simply copy and paste the code into any new Microsoft Visual C# console application and you should be good to run this application.
/*This is a console application to introduction to variables.
Every program requires a heading, which is below. The fields
will vary according to the class or organization you are
creating this program. For this class we will use temperature
conversions.
What is a variable? Think of a variable as a container that
holds items.
Program: Introduction to Variables
Programmer: Mike Kniaziewicz
Date: February 26, 2012
Version: 1.0.0 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Introduction_to_Variables //namespace is a system level object
{
class Program
{
//Every C, C++, and C# will have a Main method
static void Main(string[] args)
{
/*This is where you declare variables to be used
I generally place the first letter of the variable type before the variable for readability in the Main function. Here are the formulas we will be using:
C = (F – 32) * 5/9
F = C * 9/5 + 32*/
double dcelcius, dfahrenheit;
string scelcius;
Console.WriteLine(“Enter a temperature to convert to celcius:”);
//always returns a string value,so you will need to parse (convert) it to a double
dfahrenheit =double.Parse(Console.ReadLine());
/* For math always remember Please (Parenthesis) Excuse(Exponents)
My (Multiplication) Dear (Division) Aunt (Addition) Sallie (Subtraction)*/
dcelcius = (dfahrenheit – 32) * 5 / 9;
//Format the double output, so there are 0 decimal places
Console.WriteLine(“You entered {0:F0} F, celcius is {1:F0}\n”, dfahrenheit, dcelcius);
//Convert Celcius to Fahrenheit; however do not convert the string
//until performing the math
Console.WriteLine(“Enter a temperature to convert to Fahrenheit:”);
scelcius =Console.ReadLine();
dfahrenheit =double.Parse(scelcius) * 9 / 5 + 32;
Console.WriteLine(“You entered {0} C, fahrenheit is {1:F0}\n”, scelcius, dfahrenheit);
//Console.ReadKey will keep the Console application open waiting for a keyboard response
Console.ReadKey();
}
}
}
