Error comparing a number that has been read from a .txt file

Thanks to all of you !

I have never used an online forum. This is my first time, and I'm glad to meet, really kind people like you guys ! @Anke @Taifun @Patryk_F :star_struck: THANKS A LOT!

P.S: I will mark as solution @Patryk_F 's reply, but @Anke 's reply also works perfect !