## Variables¶ A variable outputs a value from the context, **Simple variable** ```html My first name is {{ first_name }}. My last name is {{ last_name }}. ``` Dictionary lookup, attribute lookup and list-index lookups are implemented with a dot notation: **Object Attributes** ```html {{ my_dict.key }} {{ my_object.attribute }} {{ my_list.0 }} ``` ## Tags Tags provide arbitrary logic in the rendering process. Tags are surrounded by {% and %} like this: ### For loop ```html {% for task in task_list %} <li>{{ task.title }}</li> {% endfor %} ``` ### IF **Simple if clause** ```html {% if athlete_list %} Number of athletes: {{ athlete_list|length }} {% endif %} ``` **Complex IF ELSE Clause** ```html {% if athlete_list %} Number of athletes: {{ athlete_list|length }} {% elif athlete_in_locker_room_list %} Athletes should be out of the locker room soon! {% else %} No athletes. {% endif %} ``` ### Comment Template ignores everything between {% comment %} and {% endcomment %}. ```html {% comment "Optional note" %} Commented out text with {{ create_date|date:"c" }} {% endcomment %} ``` ### extends Current file extends the content of other file. Block from referenced file will be replaced with block from this file. Thnks of inheritance. ```html {% extends "geeks.html" %} {% block content %} <h2> GeeksForGeeks is the Best {% endblock %} ``` ### include We can include other html file for specific section. This is very usefull from reusibility point of view. ```html {% include "header.html" %} ``` ## Filters Filters transform the values of variables and tag arguments. ```html {{ django|title }} {{ my_date|date:"Y-m-d" }} {{ html|safe }} {{string|lower}} {{string|truncatewords:80}} ```