This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

mxGetInf (C and Fortran)

Value of infinity

C Syntax

#include "matrix.h"
double mxGetInf(void);

Fortran Syntax

real*8 mxGetInf


Value of infinity on your system.


Call mxGetInf to return the value of the MATLAB® internal inf variable. inf is a permanent variable representing IEEE® arithmetic positive infinity. Your system specifies the value of inf; you cannot modify it.

Operations that return infinity include:

  • Division by 0. For example, 5/0 returns infinity.

  • Operations resulting in overflow. For example, exp(10000) returns infinity because the result is too large to be represented on your machine.


See the following examples in matlabroot/extern/examples/mx.

Introduced before R2006a

Was this topic helpful?