I hope this helps. com/explore/is-the-letter-y-a-vowel-or-a-consonant
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I hope this helps.
en.oxforddictionaries.com/explore/is-the-letter-y-a-vowel-or-a-consonant
Yes, the glides (semivowels) /w/ (W) and /j/ (Y) are both half-vowel and voiced. They have some of the qualities of a vowel and of a consonant.