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description: Set and store variables to be used throughout the business process.
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# Variables

Variable blocks can store variables of basic types to be used throughout the business process. You can set a value for the variable with a [Set Variable block](https://docs.appmaster.io/docs/business-logic/block/logic/set-variable) or with a default value. You can then connect this variable as an input anywhere in the business process. Variables can be set as a single value or as an array.
