Binary to Decimal

Brett McLean Dec 10, 2002

This simple Javascript will convert a base 2 binary number into a base 10 decimal number, and vice versa. Works in all browsers!

Input	Output

The JavaScript Source: Miscellaneous: Binary to Decimal

Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s). The script is yours!!!

<!-- TWO STEPS TO INSTALL BINARY TO DECIMAL:

1.  Copy the coding into the HEAD of your HTML document

2.  Add the last code into the BODY of your HTML document  -->

<HEAD>

var num1;

var num2;

var currnum;

function convert()

{

currnum = 128;

if(document.binaryform.select1.value == "b2d")

{

num1 = document.binaryform.text1.value;

num2 = eval(num1.charAt(0)) * currnum;

for (i = 1; i <= 7; i++)

{

currnum = currnum / 2;

num2 = num2 + (eval(num1.charAt(i)) * currnum);

}

document.binaryform.text2.value = num2;

}

else

if(document.binaryform.select1.value == "d2b")

{

num1 = eval(document.binaryform.text1.value);

if(num1 >= currnum)

{

num2 = "1";

num1 = num1 - currnum;

currnum = currnum / 2;

}

else

{

num2 = "0";

currnum = currnum / 2;

}

for (p = 1; p <= 7; p++)

{

if(num1 >= currnum)

{

num2 = num2 + "1";

num1 = num1 - currnum;

currnum = currnum / 2;

}

else

{

num2 = num2 + "0";

currnum = currnum / 2;

}

document.binaryform.text2.value = num2;

}

</script>

</HEAD>

<BODY>

<tr>

<b>Input</b><br>

</td>

<b>Output</b><br>

</td>

</tr>

<tr>

<td>

</tr>

<tr>

<option value="b2d">Binary to Decimal

<option value="d2b">Decimal to Binary

</select>

</td>

</tr>

</form>

</table>

</center>

<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>

by <a href="http://javascriptsource.com">The JavaScript Source</a></font>

</center><p>

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Binary to Decimal

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