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Power Platform Community / Forums / Power Automate / Adddays function dynam...
Power Automate
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Adddays function dynamic days value

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Posted on by 75

Hello,

 

I am having trouble adding a dynamic day value to the adddays funtion I keep getting the "Expression is invalid" error.

I would like to subtract days from today depending on an input from PowerApps.

 

This is my function for initialize a variable value,

 

addDays(utcNow(),-outputs('DaystoAdd'),'MM-dd-yyyy')
 
Any ideas on what I am doing wrong.
TIA
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  • Verified answer
    ManishSolanki Profile Picture
    15,091 Super User 2025 Season 2 on at

    Hi @NicolleAbrahams 

     

    You need to multiple the DaystoAdd output with -1 to get the negative number which when added with addDays function gives you the past date.

     

    Pls use the below expression:

    addDays(utcNow(),mul(int(outputs('DaystoAdd')),-1),'MM-dd-yyyy')

     

    If this helps & solves your problem, please remember to give a 👍 and accept my solution as it will help others in the future.

     

    Thanks

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