Flow Designer variables can store record data and complex data using the following data types:
* Integer: A whole number that can be used in mathematical operations.
* Array: A collection of items that can be accessed by their index or iterated over using a For each action.
* String: Any kind of text, such as email addresses or the text contents of a file.
References:
* Define and Use Data Types in a Flow (Flow Designer)
* Variable data types - Power Automate | Microsoft Learn
* Product Documentation | ServiceNow