[delacroix01]

Now that KyleGoetz noted the contraction なきゃ for なければ, I think I should add なくちゃ in as well. I'm not sure about real life speaking, but in anime, manga, and drama, I usually hear/see this contraction, and the ならない / いけない part is often omitted. Can anyone explain the difference between なきゃ and なくちゃ, like who would use each of them? I only know the difference in the number of syllables, though.