# Talk:Documentation/Calc Functions/PI

## Olivier

"which is the approximate value of π in radians, rounded to 14 decimal places."

There is no point to say "in radians" because pi here is not a measure, it is just a number

"π is an irrational number, which can be defined as the ratio of a circle's circumference to its diameter."

but you define it as a ratio. Actually, mathematically speaking, pi is "transcendental", as it is not even the solution of an algebraic equation with rational coefficients (AFAIK).

--Olivier Hallot 2020-09-22T11:42:30 (UTC)

## SF Review comments

- (1) Returns. Delete “in radians” (pi is a ratio and has no units).
- (2) Additional details, second bullet point. Insert “an” before “angle”.
- (3) Examples. In 1st example delete “with precision up” and delete “(radians)”. In 2nd example replace “(radians)” with “(cm2)”.

--Stevefanning (talk) 2020-09-26T14:28:18 (UTC)

## Ronnie

Steve: All comments handled

Olivier: About the definition of PI number, definitely PI is transcendental but this is the standard definition used everywhere. I checked other sources as well. So I see no issues in using it.