• Description:
  It showcases a basic AWS Lambda function written in Python that returns a dynamic greeting message. When invoked, the function extracts the value associated with the key “name” from the incoming event payload; if the key is missing, it defaults to “World.” The function then constructs a personalized response and returns it along with an HTTP status code. This example provides a simple introduction to serverless computing on AWS and helps you understand how events, handlers, and output structures work in Lambda.

•  Step 1: Open AWS Lambda
   Log in to the AWS Management Console.
   Search for Lambda in the search bar.
   Click Create function.
•  Step 2: Create the Lambda Function
   Choose: Author from scratch
   Function name: hello-world-lambda
   Runtime: Python 3.10 (or any version available)
   Architecture: x86_64
   Permissions: Keep default (Lambda basic execution role)
   Click Create function.
•  Step 3: Add the Python Code
   In the code editor, delete the sample code and paste:
  

  import json
  
  def lambda_handler(event, context):
      name = event.get('name', 'World')
      return {
          'statusCode': 200,
          'body': f'Hello, {name} from AWS Lambda!'
      }
    

   Click Deploy
•  Step 4: Create a Test Event
   Click Test.
   Choose Create new test event.
   Event name: Testhello
   Paste:
  

  {
    "name": "Raj"
  }
    

   Click Save.
•  Step 5: Run the Test
   Click Test again.
   The output:
  

  {
    "statusCode": 200,
    "body": "Hello, Raj from AWS Lambda!"
  }
    

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