‫Okay. So now we're done
‫with all of the Lambda invocations, now let's go
‫into more Lambda configurations and deployments.
‫So Lambda has the concept
‫of environment variables and what is it?
‫It's a key value pair in the string form,
‫and they help you adjust the function behavior
‫without updating your code.
‫The function, the environment variables will be available
‫to your code and the Lambda Service will on top
‫of things at its own system environment variables as well.
‫This is quite common when you're programming
‫to use environment variables.
‫So they're supported for Lambda.
‫The cool thing is that we can encrypt
‫these environment variables
‫for example, by KMS to store secret values.
‫And the secrets can be either encrypted
‫by the Lambda service key or your own customer master key.
‫So let's go ahead
‫and do some practice with environment variables.