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atof(3) [freebsd man page]

ATOF(3) 						   BSD Library Functions Manual 						   ATOF(3)

NAME
atof -- convert ASCII string to double LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdlib.h> double atof(const char *nptr); DESCRIPTION
The atof() function converts the initial portion of the string pointed to by nptr to double representation. It is equivalent to: strtod(nptr, (char **)NULL); The decimal point character is defined in the program's locale (category LC_NUMERIC). IMPLEMENTATION NOTES
The atof() function is not thread-safe and also not async-cancel-safe. The atof() function has been deprecated by strtod() and should not be used in new code. ERRORS
The function atof() need not affect the value of errno on an error. SEE ALSO
atoi(3), atol(3), strtod(3), strtol(3), strtoul(3) STANDARDS
The atof() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1''), ISO/IEC 9899:1990 (``ISO C90''), and ISO/IEC 9899:1999 (``ISO C99''). BSD
June 4, 1993 BSD

Check Out this Related Man Page

ATOL(3) 						   BSD Library Functions Manual 						   ATOL(3)

NAME
atol, atoll -- convert ASCII string to long or long long integer LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdlib.h> long atol(const char *nptr); long long atoll(const char *nptr); DESCRIPTION
The atol() function converts the initial portion of the string pointed to by nptr to long integer representation. It is equivalent to: strtol(nptr, (char **)NULL, 10); The atoll() function converts the initial portion of the string pointed to by nptr to long long integer representation. It is equivalent to: strtoll(nptr, (char **)NULL, 10); COMPATIBILITY
The FreeBSD implementations of the atol() and atoll() functions are thin wrappers around strtol() and strtoll() respectively, so these func- tions will affect the value of errno in the same way that the strtol() and strtoll() functions are able to. This behavior of atol() and atoll() is not required by ISO/IEC 9899:1990 (``ISO C90'') or ISO/IEC 9899:1999 (``ISO C99''), but it is allowed by all of ISO/IEC 9899:1990 (``ISO C90''), ISO/IEC 9899:1999 (``ISO C99'') and IEEE Std 1003.1-2001 (``POSIX.1''). ERRORS
The functions atol() and atoll() may affect the value of errno on an error. SEE ALSO
atof(3), atoi(3), strtod(3), strtol(3), strtoul(3) STANDARDS
The atol() function conforms to ISO/IEC 9899:1990 (``ISO C90''). The atoll() function conforms to ISO/IEC 9899:1999 (``ISO C99''). BSD
May 14, 2013 BSD

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