Number 1 Link

: 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

: Every whole number is simply a collection of 1s added together. In Symbol and Word : In math, it is called a "unit"

: Anything multiplied by 1 stays exactly the same ( ), making it the multiplicative identity . : In math

: Most commonly a single vertical line, sometimes with a serif at the top or a small bar at the base.