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Getting Started with AWS Lambda: Build Your First Serverless Function in 5 Minutes

A beginner-friendly guide to understanding AWS Lambda and deploying your first serverless Python function directly from the AWS Console.

Khilchand

I am college student and i want explore new technologies

What is AWS Lambda?

AWS Lambda is an event-driven serverless compute service that executes your code without requiring server setup, maintenance, or OS patching. You focus solely on writing business logic while AWS handles provisioning, execution, and auto-scaling.
A key benefit is its cost model: you pay only for the compute time you consume, measured in milliseconds.

Why Choose Lambda?

  • Zero Server Management: Write code and upload it; AWS manages infrastructure, runtime security, and patching.
  • Automatic Scaling: Scales dynamically from a handful of requests a day to thousands per second.
  • Cost-Effective: Includes a generous perpetual Free Tier (1 million free requests per month) before standard per-millisecond billing applies.

Step-by-Step: Creating Your First Lambda Function

1. Open the AWS Console

  1. Sign in to the AWS Management Console .
  2. In the top search bar, type Lambda and select it from the services list.

2. Create the Function

  1. Click Create function.
  2. Select Author from scratch.
  3. Configure the following settings:
    • Function name: hello-world-function
    • Runtime: Python 3.12
    • Architecture: x86_64
  4. Leave the default execution role selected and click Create function.

3. Add and Deploy Code

In the Code source editor tab, open lambda_function.py, replace its contents with the snippet below, and select Deploy:
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import json

def lambda_handler(event, context):
name = event.get("name", "Builder")
message = f"Hello, {name}! Welcome to AWS Serverless."

return {
"statusCode": 200,
"body": json.dumps({"message": message})
}


# aws-lambda# serverless# python# ai# agentic-ai
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