pi

Mathematical constant π.

Syntax

y = pi

Description

Returns the constant pi = 3.14159265358979... to double-precision. Use as a literal in formulas; treated as a function with no arguments by the interpreter.

Examples

sin(pi)                  % ≈ 0  (within eps)
2 * pi * r              % circumference

See also

• eps — Floating-point relative accuracy (machine epsilon).
• realmin — Smallest positive normalized floating-point number.
• realmax — Largest positive finite floating-point number.