Creating a Function with aws lambda create-function

When you want to deploy code to Lambda, use aws lambda create-function. It creates a new function.

The syntax is aws lambda create-function --function-name name --runtime runtime --handler handler --role role-arn.

Running aws lambda create-function --function-name my-func --runtime nodejs20.x creates the function and returns its ARN and configuration.

A common stumble is omitting the execution role. Every function needs an IAM role granting it permission to write logs and reach other services.

In real work, functions are deployed by CI or by a framework rather than by this command directly, but knowing it clarifies what those tools do.