MATLAB Function Reference

pi

Ratio of a circle's circumference to its diameter,

Syntax

pi

Description

pi returns the floating-point number nearest the value of . The expressions 4*atan(1) and imag(log(-1)) provide the same value.

Examples

The expression sin(pi) is not exactly zero because pi is not exactly :

sin(pi)

ans =

   1.2246e-16

See Also

ans, eps, i, Inf, j, NaN

persistent

pie