return 'Not a Number' NAME nan, nanf, nanl - return 'Not a Number' LIBRARY Math library ( libm , -lm ) SYNOPSIS #include <math...return 'Not a Number' NAME nan, nanf, nanl - return 'Not a Number' LIBRARY Math library ( libm , -lm ) SYNOPSIS #include <math......described in this manual page is similar. SEE ALSO atof (3), atoi (3), atol (3), nan (3), nanf (3), nanl (3), strfromd (3), strtol (3), strtoul (3)...described in this manual page is similar. SEE ALSO atof (3), atoi (3), atol (3), nan (3), nanf (3), nanl (3), strfromd (3), strtol (3), strtoul (3)...described in this manual page is similar. SEE ALSO atof (3), atoi (3), atol (3), nan (3), nanf (3), nanl (3), strfromd (3), strtol (3), strtoul (3)