In English, there are 21 consonant letters. These include Bb, Cc, Dd, Ff, Gg, Hh, Jj, Kk, Ll, Mm, Nn, Pp, Qq, Rr, Ss, Tt, Vv, Xx, and Zz. Consonants are the opposite concept of vowels. Generally, all non-vowel letters are considered consonants. In simpler terms, all non-vowel letters, excluding semi-vowels, are consonants.
