# Computer Conversions (Hexadecimal, Decimal, Octal and Binary)

By , 5 Feb 2007

## Introduction

This code was written to show how to convert from Hexadecimal, Decimal, Octal or Binary out to a Hexadecimal, Decimal, Octal or Binary value. Many functions demonstrate `Hex2Bin`, `Bin2Hex`, `Hex2Dec`, `Dec2Hex`, etc. This code will show you how easy it is to convert between any of these bases (2, 8, 10, 16).

## Background

It is good to understand how binary conversions work. Take a look here for more information.

## Using the Code

Enter an input value, and see what the output value is. It's that easy. Use the arrows to add or subtract the value.

The two main functions that deal with the conversions include `Input2Binary() `and `Binary2Output()`. From these functions, you can take any input type and convert it to binary, and then convert that binary value to any output type.

The `Input2Binary() `function contains this code:

```// Convert the current input into binary
// NOTE: convert string from base 'n'
switch( numberStyle.ToUpper() )
{
currInput = Convert.ToUInt64(txtObject, 16);
break;
case "DECIMAL":
currInput = Convert.ToUInt64(txtObject, 10);
break;
case "OCTAL":
currInput = Convert.ToUInt64(txtObject, 8);
break;
case "BINARY":
currInput = Convert.ToUInt64(txtObject, 2);
break;
}```

The `Binary2Output() `function contains this code:

```// Convert the int to the correct output
switch( numberStyle.ToUpper() )
{
txtObject = Convert.ToString(currVal, 16).ToUpper();
break;
case "DECIMAL":
txtObject = Convert.ToString(currVal, 10);
break;
case "OCTAL":
txtObject = Convert.ToString(currVal, 8);
break;
case "BINARY":
txtObject = Convert.ToString(currVal, 2);
break;
}```

## History

• 5th February, 2007: First version

 Scott Klawitter Web Developer United States Member
Scott Klawitter programs mainly in Visual Studio .NET with a focus in C# development.

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