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Replace string

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Posted on by nicklim

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Hi, can someone please show me how can I remove the string Dynamic from "Initialize variable" and replace it with the value of "Initialize variable 2" ?

On a side note, the string “Dynamic” can be changed from time to time to another random string

So the end result should be "Static Hola Static2".

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Chriddle 8,436 Super User 2025 Season 2 on at

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Use following Expression:

replace(variables('DynamicString'), 'Dynamic', variables('ReplacementString'))

https://learn.microsoft.com/en-us/azure/logic-apps/workflow-definition-language-functions-reference#replace

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nicklim 391 on at

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@Chriddle

Sorry I should’ve be more clear. The string “Dynamic” can be changed each time. For example Dynamic123 or maybe Dynamic456.

im trying to get power automate to replace the string between Static and Stanic1 with variables(‘ReplacementString’)

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Srini007 3,327 Super User 2025 Season 2 on at

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Hi @nicklim

Try as below

So, in compose it will be as below

replace(variables('OrignalString'), variables('StringToReplace'), variables('ReplacementString'))

Replace will require 3 parameters

1) MainText 2)OldText 3) New Text

You can refer also below for your reference

https://manueltgomes.com/reference/powerautomate-function-reference/replace-function/

If you find this reply helpful, please consider giving it a LIKE AND

If this reply answers your question or solves your issue, please ACCEPT AS SOLUTION

Thanks,

Srini

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Chriddle 8,436 Super User 2025 Season 2 on at

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You have to think of a proper definition of 'Static' and 'Static1' (or 'Dynamic') 😉

How can you distinguish static and dynamic parts of the string?

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nicklim 391 on at

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@Chriddle

As an example

When an email arrives into my mailbox.

The email body contains a sentence.
Product: Apple x1

'Product:' and 'x1' will always be the same string when the email arrives whereas the string between those two can be changed to maybe Product: Orange x1

I hope that make sense.

Thanks

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nicklim 391 on at

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Hi @Srini007

Sorry for the confusion, the string “Dynamic” can be changed from time to time.

As an example

When an email arrives into my mailbox.

The email body contains a sentence.
Product: Apple x1

'Product:' and 'x1' will always be the same string when the email arrives whereas the string between those two can be changed to maybe Product: Orange x1

hope that makes sense.

thank you

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Srini007 3,327 Super User 2025 Season 2 on at

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Hi @nicklim

I believe this is what you are looking for

The flow remains same, but StringToReplace variable you need to write an expression it will split and get the Dynamic value Orange or Apple etc which is in between Product: and x1, Below is the expression

first(split(last(split(variables('OrignalString'), 'Product: ')), ' x1'))

and follows by the end expression of the compose to see the replaced value

replace(variables('OrignalString'), variables('StringToReplace'), variables('ReplacementString'))

Above is the end flow

If you find this reply helpful, please consider giving it a LIKE AND

If this reply answers your question or solves your issue, please ACCEPT AS SOLUTION

Thanks,

Srini

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Chriddle 8,436 Super User 2025 Season 2 on at

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Or so:

replace( outputs('OldString'), subString( outputs('OldString'), length('Product: '), sub(lastIndexOf(outputs('OldString'), ' x1'), length('Product: ')) ), outputs('ReplacementString') )

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