how to remove index.php from the url in codeigniter

how to remove index.php from the url in codeigniter
1. First you need to write the .htaccess file it look like this:-

RewriteEngine On
RewriteCond %{REQUEST_URI} ^/system.*
RewriteRule ^(.*)$ index.php?/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ index.php?/$1 [L]

2. Remove index.php from config file:
$config['index_page'] = 'index.php';
    After removing it look like
    $config['index_page'] = '';
3 Run your url without index.php

your url should we:

example.com/controller_name/function_name/arguments