MATLAB Function Reference

realmin

Smallest positive floating-point number

Syntax

• n = realmin
  

Description

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

Examples

realmin is 2^(-1022) or about 2.2251e-308.

Algorithm

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

Execute type realmin to see minexp for various computers.

See Also

eps, realmax

realmax

realpow