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detect NaN

huanghe
Beginner
‎08-13-2007 09:03 AM
1,178 Views
In the fortran, how to detect "NaN", "....", "???" apearing for a real variable and to stop the running of the code immediately after detecting it?
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Steven_L_Intel1
Employee
‎08-13-2007 09:15 AM
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If you want to test in code for a NaN, use the intrinsic function ISNAN. (This is an extension - a future version will support the F2003 standard routine for this purpose.)

If you want the program to stop automatically when a NaN is seen, then change the Floating Point Exception behavior to /fpe:0.
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