ATOF(3) Linux Programmer's Manual ATOF(3)

atof - convert a string to a double

#include <stdlib.h>
double atof(const char *nptr);

The atof() function converts the initial portion of the string pointed to by nptr to double. The behavior is the same as

strtod(nptr, NULL);

except that atof() does not detect errors.

The converted value.

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
atof () Thread safety MT-Safe locale

POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.

atoi(3), atol(3), strfromd(3), strtod(3), strtol(3), strtoul(3)
2016-12-12 GNU