NAN(3) BSD Library Functions Manual NAN(3)NAME
nan — generate a quiet NaN
nan(const char *tagp);
nanf(const char *tagp);
The nan() and nanf() functions return a quiet NaN. The character string
tagp is converted to an integer, which is clipped to the range 0 to 255,
inclusive. This value is used as the NaN code. The NaN code is placed in
the 8th through 15th most significant bits of the fraction field of the
If tagp is empty, 0 is used for the NaN code.
The nan() and nanf functions conform to ISO/IEC 9899:1999(E).
BSD July 24, 2003 BSD