（11）模板语言-if判断

views.py

from django.shortcuts import render,HttpResponse

# Create your views here.

def index(request):
    age = 1
    return render(request,'index.html',{'age':age})

index.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>我是首页</h1>
    {{ age }}

    {#在页面中判断    #}
    {% if age > 18 %}
        <p>已经成年了</p>
        {% elif age < 18 %}
        <p>还没有成年</p>
        {% else %}
        <p>正好成年</p>
    {% endif %}
</body>
</html>

urls.py

from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'index/', views.index)
]