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pi

Ratio of circle's circumference to its diameter

Syntax

pi

Description

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

Examples

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Compute the sine of pi. The result is not exactly zero in floating point arithmetic.

sin(pi)
ans =

   1.2246e-16

Introduced before R2006a

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