# CodeIgniter User Guide Version 2.1.4

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# Number Helper

The Number Helper file contains functions that help you work with numeric data.

## Loading this Helper

This helper is loaded using the following code:

`$this->load->helper('number');`

The following functions are available:

## byte_format()

Formats a numbers as bytes, based on size, and adds the appropriate suffix. Examples:

`echo byte_format(456); // Returns 456 Bytes
echo byte_format(4567); // Returns 4.5 KB
echo byte_format(45678); // Returns 44.6 KB
echo byte_format(456789); // Returns 447.8 KB
echo byte_format(3456789); // Returns 3.3 MB
echo byte_format(12345678912345); // Returns 1.8 GB
echo byte_format(123456789123456789); // Returns 11,228.3 TB`

An optional second parameter allows you to set the precision of the result.

`echo byte_format(45678, 2); // Returns 44.61 KB`

Note: The text generated by this function is found in the following language file: language//number_lang.php