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"Erre" is a form of "erre", a noun which is often translated as "r". "I" is a noun which is often translated as "i". Learn more about the difference between "erre" and "i" below.
la erre()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
la i()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
