# 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.