{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Template with conditions",
  "Parameters": {
    "Environment": {
      "Type": "String",
      "Default": "dev"
    }
  },
  "Conditions": {
    "IsProd": { "Fn::Equals": [{ "Ref": "Environment" }, "prod"] }
  },
  "Resources": {
    "MyBucket": {
      "Type": "AWS::S3::Bucket",
      "Properties": {
        "BucketName": { "Fn::If": ["IsProd", "prod-bucket", "dev-bucket"] }
      }
    }
  }
}