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C# for Programmers: A Practical Guide

Variable Types

Explore the various variable types in C# including integers, floating-point numbers, characters, and booleans. Understand their memory sizes, storage ranges, and how to properly cast values. This lesson helps you grasp fundamental data types needed for effective C# programming.

We'll cover the following...

Integer

An integer is a number that does not have any decimal places. It is a whole number, for example, 1,2,3,4 are all integers. 4.3 is not. If you were to try and place the number 4.3 into an integer, the number would​ be truncated to 4.

There are further different types in an integer as well. All of them differ in size which we’ll discuss further down the lesson.

Let’s take a look at them one by one.

C#
using System;
namespace VariablesExampleOne
{
    class Program
    {
        static void Main(string[] args)
        {
            sbyte a = -128; 
            Console.WriteLine("The variable a contains " + a);
            byte b = 255;
            Console.WriteLine("The variable b contains " + b);
            short c = 32767;
            Console.WriteLine("The variable c contains " + c);
            ushort d = 65535;
            Console.WriteLine("The variable d contains " + d);
            int e = 2147483647;
            Console.WriteLine("The variable e contains " + e);
            uint f = 4294967295;
            Console.WriteLine("The variable f contains " + f);
            long g = 9223372036854775807;
            Console.WriteLine("The variable g contains " + g);
            ulong h = 18446744073709551615;
            Console.WriteLine("The variable h contains " + h);
        }
    }
}

Float

Floats are floating point ...