MATLAB Application Program Interface Reference

Get the value of infinity

real*8 function mexGetInf()

Arguments

none

Returns

The value of infinity on your system.

Description

Call mexGetInf to return the value of the MATLAB internal inf variable. inf is a permanent variable representing IEEE arithmetic positive infinity. The value of inf is built in to the system; 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(100000) returns infinity because the result is too large to be represented on your machine.