How do I manipulate string (append or replace one character)

I have a text string and I need to be able to replace a character at a certain position.

I've been searching for a solution to this to no avail. Is there any command to do this?

Thank you very much for your help.

https://www.scirra.com/manual/126/system-expressions

and

https://www.scirra.com/tutorials/1337/e ... t-2/page-1

Thanks so much for your help! I'll look into it.

I have a text string and I need to be able to replace a character at a certain position.

I've been searching for a solution to this to no avail. Is there any command to do this?

Thank you very much for your help.

Hello.

I need to do that too, but I can not get away with the Regex. Did you find the solution?

Thanks