The generic syntax of IF ELSE condition is as below:

if condition:
    do this
else:
    do that

Python syntax is almost the same as the pseudo-code written above. 

if 2 > 1:
    print('condition is true')
else:
    print('condition is false')

IF ELSE syntax for the Django template is slightly different. If is the builtin tag in Django templates. The basic syntax is:

{% if is_user_logged_in %}
    <div>Hello {{username}}</div>
{% else %}
    <div>Hello</div>
{% endif %}

IF tag evaluates the variable and variable is considered True if it exists and is not empty (if that variable is any iterable) and is not a False boolean value. Which means we can use a boolean variable, a list or a set with IF tag.

For example:

mylist = []
if mylist:
    print("true")
else:
    print("false")    

will print false.

We can use multiple elif with IF tag.

{% if user_type == "admin" %}
    <div>Welcome {{user}}</div>
{% elif user_type == "developer" %}
    <div>Hello {{user}}</div>
{% elif user_type == "QA" %}
    <div>Hi {{user}}</div>
{% else %}
    <div>Greetings {{user}}</div>
{% endif %}

Any combination of and, or and not can be used. and is given a higher priority than or.

{% if condition_1 and condition_2 or condition_3 %}

in operator can be used as below.

{% if user in vip_user_list %}

Filters can also be used in IF condition.

{% if message|length > 100 %}
    <a href="">View More</a>
{% else %}
    {{ message }}
{% endif %}