Pamac can’t be interrupted by Ctrl-C:
$ pamac checkupdates
^C^C^C^[[A
^C^C^C^C
Your system is up-to-date.
Pamac 10.2.2-5
Pamac can’t be interrupted by Ctrl-C:
$ pamac checkupdates
^C^C^C^[[A
^C^C^C^C
Your system is up-to-date.
Pamac 10.2.2-5
And you shouldn’t - you would risk and unbootable system.
Depending on the current status of your system and the process - interupting the process leaves the possibility of post upgrade hooks not being executed and thus your system will break.