Is iota a Greek vowel?

Is iota a Greek vowel? Greek has roughly the same five vowels as English. Like English, Greek has SHORT and LONG versions of its vowels. Notice that the letter forms for alpha, iota, and upsilon are used for both long and short vowels.

What are the 7 Greek vowels? The vowels are α, ε, η, ι, ο, ω, υ. The remaining letters are consonants.