AWS Cloudformation- How to do string Uppercase or lowercase in json/yaml template

Question

I am working on AWS CloudFormation and I created one template in which I asked user to select Environment.

On the basis of selected value I created the resources.

Answer 1

I got the answer of this question. For this I have used Mappings JSON in which I have added values like If Selected value is DEV then use dev, If QA then qa like this, and used below JSON which used Fn:FindInMap

[ { "Fn::FindInMap": [ "Enviroment", "PlatformName", { "Ref": "selectedEnv" } ] }, "clientname" ]

Below is the Mappings JSON:

"Mappings" : { "Enviroment" : { "PlatformName" : { "DEV" : "dev", "QA" : "qa", "UAT" : "uat", "PROD" : "prod" } } }