Definition & Meaning of "from A to B"

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

The idiom "from A to B" is derived from the basic concept of moving or transitioning between two points or locations, often represented as points A and B on a map or in a journey. This idiomatic expression is used to describe a straightforward journey, transition, or process of moving from one stage or point to another with a clear and direct path.