Power Automate ToUpper Function Explained

Power Automate ToUpper Function

The Power Automate ToUpper function lets you convert all characters of a given string to uppercase.

Its counterpart is the toLower function, that lets you convert all characters of a given string to lowercase.

In this article, I’ll introduce you to the toUpper function and will provide a step-by-step guide on how to use the function in a Microsoft flow.

Power Automate ToUpper Function

power automate toupper
Power Automate toUpper expression

Convert the input string to all uppercase letters and keep any characters that don’t have a uppercase version in their original form in the returned string.



Input parameters

  • text (mandatory): The string in uppercase format to be returned.

Return value

  • Returns a string in uppercase based on the given text.

Power Automate ToUpper Expression Example

=> ABCDEF123

How To Use The Power Automate ToUpper Function

Follow the steps to understand how to use the toUpper function in a Microsoft flow.

  1. Create a new flow with trigger ‘Manually trigger a flow’

    Power Automate ToUpper new flow

    New flow

  2. Add a new step by clciking on ‘+ New step’

    Power Automate ToUpper new step

    Add a new step

  3. Search for ‘initialize’ and click on the ‘Initialize variable’ action

    Power Automate ToUpper init var

    Add Initialize variable action step

  4. Setup Initialize variable action: 1) Set a name, 2) Select ‘String’ as type, 3) Set value to ‘Power AutoMATE toupper #!?’

    Power Automate ToUpper setup var

    Configure Initialize variable action

  5. Add a compose step: search for ‘comppose’ and click on the ‘Compose’ action

    Power Automate ToUpper add compose

    Add Compose action step

  6. Configure compose: 1) Click into Inputs text field (popup appears), 2) click on ‘Expression’, 3) set expression to ‘toupper(variables(‘myText’))’, 4) click ‘OK’

    Power Automate ToUpper setup compose

    Cerate toUpper Power Automate expressioin

  7. Save and do a test run

    Power Automate ToUpper result test run

    Result Test run – Power Automate toUpper function

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