Definition & Meaning of "from A to Z"

What is the origin of the idiom "from A to Z" and when to use it?

The idiom "from A to Z" is derived from the English alphabet. "A" represents the beginning, and "Z" represents the end. It is a way of saying that something encompasses everything or covers the entire range. This idiomatic expression is used to indicate completeness or comprehensiveness, suggesting that something includes all possible aspects or items.