In Azure Logic Apps, variables store and manipulate data during workflow execution. Developers use variables to keep values they need to reference multiple times, run calculations, or evaluate conditions. This approach simplifies workflows and makes them more flexible and easier to maintain.
Logic Apps enforces specific naming rules for variables to ensure consistency.
📝 One-Minute Brief
Logic Apps variables have specific naming rules, size limits, and usage restrictions that can affect workflow design and execution. This Friday Fact highlights the key constraints developers should know to avoid runtime errors, design limitations, and unexpected behavior in Azure Logic Apps.
Variable name size and restrictions
- Name length:
- The minimum length for a variable name is 1 character.
- The maximum length for a variable name is 80 characters.
- Unique name across workflow:
- The variable name must be unique within the Logic App (workflow).
- Allowed Characters:
- The variable name can contain alphanumeric characters and symbols.
- Variable Name Restrictions:
- The name cannot be empty and cannot end with a whitespace character or a period (‘.’) character. However, these are allowed in the middle or at the beginning.
- The name cannot contain any control characters or any of the following symbols:
- \
- <
- >
- %
- &
- ?
These rules are equal for Logic App Standard and Consumption.
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