i've installed whatsapp from here " Install WhatsApp for Linux on Arch Linux using the Snap Store | Snapcraft " neither i was able to open it. and now i can't even uninstall it .
sudo snap remove whatspp-for-linux
thanks but i've already tried this command and it shows that it is uninstalled but it is still visible in all application menu.
That's a different problem.
Are you using KDE?
yes i'm using a KDE
Is this similar to your problem?
Basically the issue is that he wants to remove app icons references in Plasma/KDE Launcher.
I assume your problem is that the whatspp package is removed from your system but the corresponding icon in KDE Launcher is still there showing.
Try to check if you can find a .desktop file for that app and delete it:
A simple reboot might be all that is needed.