Number: 1

: In math, it is called a "unit" and is the only number that is neither prime nor composite.

"Start at the top and down you run, That’s the way to make a one!" Number 1

: Most commonly a single vertical line, sometimes with a serif at the top or a small bar at the base. : In math, it is called a "unit"

: Spelled O-N-E , it originates from the Old English word ān . : In math

If you're looking for a simple way to remember how to write it: