atof - convert a string to a double

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  RETURN VALUE  ATTRIBUTES  STANDARDS  HISTORY  SEE ALSO 

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NAME

atof − convert a string to a 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. The behavior is the same as

strtod(nptr, NULL);

except that atof() does not detect errors.

RETURN VALUE

The converted value.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

STANDARDS

C11, POSIX.1-2008.

HISTORY

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

SEE ALSO

atoi(3), atol(3), strfromd(3), strtod(3), strtol(3), strtoul(3)

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