It’s an F. Since the consonant F begins with a vowel sound (eff), it takes the article "an".
It’s an F. Since the consonant F begins with a vowel sound (eff), it takes the article an.
I got an F on my exam.
I got a F on my exam.
The aircraft was followed by an F-16 fighter plane.
Use also the article "an" before acronyms that begin with F and are pronounced as individual letters; for example, we say:
- an FBI... (Federal Bureau of Investigation)
- an FDA... (US Food and Drug Administration)
- an FYI... (For Your Information)
- an FBR... (Foundation for Biomedical Research)
My father has been an FBI agent since 2011.
Other acronyms, however, are pronounced as words, including:
- FAANG (Facebook, Amazon, Apple, Netflix, and Google)
- FIFO (First In, First Out)
- Fmr. (Former)
- FOREX (Foreign Exchange)
And they take the article "a" if the initial sound of the word is a consonant.
A FIFO file is similar to a pipe.