If you know the index of the element you want to delete you can use a slice

@arr = @arr[0,1,3];
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otherwise I'm not sure if you can avoid an (implicit) loop.
One possibility would be a grep

@arr = grep { $_ !~ /c/ } @arr;
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Why do you want to avoid a loop? Are there so many elements in the array? Maybe you could avoid putting the unwanted elements in the array in the first place.

cheers, si_lence