how can i update the input after the user has entered a number?

How can i update the input after the user has entered a number, i tried to make another input box to see if the formatting worked, but how can i integrate it into the same input?????HELP

Gaetano, check the OML attached.

Example1.oml

Hi @gaetano cerciello ,

Use "Assign" widget and "OnChange" event on that text box. In onChange event change the format and re-assign new value to same variable that you use previously.

Or

OnChange event perform looping logic for every digit that user enter and place , in between

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