Question

what is the full form of P.I. ?

Answer 1

"pI"  it's mathematical constant, and it's derived from greek letter "π"
so, it spelled out as pi.

and pi value we know that

3.141  or 22/7

hope it's help u

Answer 2

Hi friend,

Full form of P.I. is
Private Investigator.
Public Information
Post Intelligencer
Propidium Iodide

Many full forms are there for P.I

If the question is from maths,the answer is

pi, it is a mathematical constant. It's symbol is π.
It is spelled as 'pi'.
Value of pi is 3.14.. or 22/7

hope it helps you