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How to check NaN

ekeom
Novice
‎03-02-2009 06:02 AM
1,225 Views
Dear all,

How can I check if a variable contain NaN (Not a number). I would like to write something like :

if(a.eq.NaN) then

Do something special

endif

Best regards,

Didace
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TimP
Honored Contributor III
‎03-02-2009 06:06 AM
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This has been discussed at more length previously on these forums. Current ifort supports both the legacy (non-standard) ISNAN() function and the standard ieee_is_nan().
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