realmax

Largest positive floating-point number

Syntax

f = realmax

f = realmax(precision)

Description

f = realmax returns the largest finite floating-point number in IEEE^® double precision. This is equal to (2-2^(-52))*2^1023.

f = realmax(precision) returns the largest finite floating-point number in IEEE single or double precision. This is equal to realmax for double precision, and to single((2-2^(-23))*2^127) for single precision.

Examples

Double Precision

Set the output format to long scientific notation. Return the largest finite floating-point number in IEEE® double precision.

format long e
f = realmax

f = 
    1.797693134862316e+308

Single Precision

Return the largest finite floating-point number in IEEE® single precision.

f = realmax('single')

f = single
    3.4028e+38

Check the class of f.

class(f)

ans = 
'single'

Input Arguments

precision — Floating-point precision type

'double' (default) | 'single'

Floating-point precision type, specified as 'double' or 'single'.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.