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Intrinsic function reference

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AWS CloudFormation provides several built-in functions that help you manage your stacks. Use intrinsic functions in your templates to assign values to properties that are not available until runtime.

• Note*

You can use intrinsic functions only in specific parts of a template. Currently, you can use intrinsic functions in resource properties, outputs, metadata attributes, and update policy attributes. You can also use intrinsic functions to conditionally create stack resources.

• Topics*

• Fn::Base64
• Fn::Cidr
• Condition functions
• Fn::FindInMap
• Fn::GetAtt
• Fn::GetAZs
• Fn::ImportValue
• Fn::Join
• Fn::Select
• Fn::Split
• Fn::Sub
• Fn::Transform
• Ref

Fn::Base64

Fn::Cidr

Condition functions

Fn::FindInMap

Fn::GetAtt

Fn::GetAZs

Fn::ImportValue

Fn::Join

Fn::Select

Fn::Split

Fn::Sub

Fn::Transform

Ref