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nan
The function nan tests for NaN.
Compatibility:
This function is compatible with the following targets:
Prototype:
#include <math.h>
double nan( const char *tagp );
Parameters:
Parameters for this function are:
Return:
A quiet NAN if available. See "Quiet NaN," fore more information.
See Also:
"isnan"
"NaN Not a Number"
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Last updated: August 16, 2000