realmin

Purpose

Smallest positive floating-point numbers.

Synopsis

n = realmin

Description

realmin is the smallest positive normalized floating-point number on a particular computer. Anything smaller underflows or is an IEEE denormal.

Examples

On machines with IEEE floating-point format, realmin is 2^(-1022) or about 2.2251e-308.

Algorithm

realmin is pow2(1,minexp) where minexp is the smallest possible floating-point exponent.

Execute type realmin to see minexp for various computers.

See Also

eps, log2, pow2, realmax

(c) Copyright 1994 by The MathWorks, Inc.