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# pip install django
# Create a new Django project
django-admin startproject FirstDjangoProg
cd FirstDjangoProg
# Create a new app
python manage.py startapp calculator
# In FirstDjangoProg/settings.py, add 'calculator' to INSTALLED_APPS
# In FirstDjangoProg/urls.py
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('', include('calculator.urls')),
]
# In calculator/urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.calculator, name='calculator'),
]
# In calculator/views.py
from django.shortcuts import render
from django.http import JsonResponse
def calculator(request):
if request.method == 'POST':
num1 = float(request.POST.get('num1', 0))
num2 = float(request.POST.get('num2', 0))
operation = request.POST.get('operation', '+')
if operation == '+':
result = num1 + num2
elif operation == '-':
result = num1 - num2
elif operation == '*':
result = num1 * num2
elif operation == '/':
result = num1 / num2 if num2 != 0 else 'Error: Division by zero'
else:
result = 'Error: Invalid operation'
return JsonResponse({'result': result})
return render(request, 'calculator/calculator.html')
# Create a new file: calculator/templates/calculator/calculator.html
<!DOCTYPE html>
<html>
<head>
<title>Calculator</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<h1>Calculator</h1>
<input type="number" id="num1" placeholder="Number 1">
<select id="operation">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="number" id="num2" placeholder="Number 2">
<button id="calculate">Calculate</button>
<p id="result"></p>
<script>
$(document).ready(function() {
$('#calculate').click(function() {
$.ajax({
url: '',
type: 'POST',
data: {
num1: $('#num1').val(),
num2: $('#num2').val(),
operation: $('#operation').val(),
csrfmiddlewaretoken: '{{ csrf_token }}'
},
success: function(response) {
$('#result').text('Result: ' + response.result);
}
});
});
});
</script>
</body>
</html>
# Run migrations
python manage.py migrate
# Start the development server
python manage.py runserver
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