hi guys I’m trying firebase phone authenication. So i want to check that the number that user entered in textbox that number lenght should be 10 digit. I have tried math blocks but it’s not working. Can you please help me. Btw Thank your for Reading :slight_smile:

You can use inbuilt blocks itself. Use On text changed block, use the maths block (if length of the text box is equal to 10 make the app) to proceed further. If not use the notifier to pop up the alert

Kodular Community

Validate Mobile No

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dora_paz (Dora) April 3, 2021, 10:02am 2

See here

Limit the numbers of characters in a text box? Discuss

How can I limit the numbers of characters the user types on a text box?

MIT App Inventor Community – 20 Feb 21

All Rescued Extensions From Inactive Communities

Extensions

free-extension

I believe this is the extension that you are looking and since @Taifun said that it is ok to share it Extension Name : TextBoxTools Extension by Ken Download Aix : com.appybuilder.kennicholsandroid.TextBoxTools.aix (8.0 KB) Extension Blocks :

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