Use Of The A And An Questions Medium
The rule for using "A" or "An" before nouns starting with "H" is determined by the sound that follows the "H" in the word.
If the "H" is followed by a vowel sound, we use "An." For example, "an hour," "an honest person," "an heir."
If the "H" is followed by a consonant sound, we use "A." For example, "a house," "a hotel," "a history book."
It is important to note that the rule is based on the sound, not the actual letter. So, even if the word starts with an "H," if the sound that follows is a consonant sound, we use "A."