Drupal Module - Simple Form And Menu

Here's an example of module that show the simplest form:
form_learning.info

; Form Module
name = Form Learning
description = Provide Learning For Form Module
package = Learning
version = 1.0
core = 7.x

And here's the code of the module. form_learning.module
<?php

/**
 * Implements drupal hook_menu()

 * 

 * page argument is the most significant one. it's a reference

 * to function that we write as form page (form provider)

 * page callback must written as drupal_get_form

 *
 */
 
function form_learning_menu(){

    $items = array();
   
    $items['learning/form'] = array(
        'title' => 'Form Learning',
        'page callback' => 'drupal_get_form',
        'page arguments' => array('form_1'),
        'access callback' => TRUE,
    );     
       
    return $items;
}

/**

 * This is the function that supply the form.

 * The function arguments should match like these one.

 */
function form_1($form, &$form_state){

    $form['description'] = array(
        '#type' => 'item',
        '#title' => t('This is the first entry of form'),
    );

    $form['name'] = array(
        '#type' => 'textfield',
        '#title' => t('Name'),
    );
   
    return $form;
}