man3/atof.3

.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Mon Mar 29 22:39:24 1993, David Metcalfe
.\" Modified Sat Jul 24 21:39:22 1993, Rik Faith (faith@cs.unc.edu)
.TH ATOF 3  2012-08-03 "GNU" "Linux Programmer's Manual"
.SH NAME
atof \- convert a string to a double
.SH SYNOPSIS
.nf
.B #include <stdlib.h>
.sp
.BI "double atof(const char *" nptr );
.fi
.SH DESCRIPTION
The
.BR atof ()
function converts the initial portion of the string
pointed to by \fInptr\fP to
.IR double .
The behavior is the same as
.sp
.in +4n
strtod(nptr, NULL);
.in
.sp
except that
.BR atof ()
does not detect errors.
.SH "RETURN VALUE"
The converted value.
.SH "CONFORMING TO"
SVr4, POSIX.1-2001, 4.3BSD, C89, C99.
.SH "SEE ALSO"
.BR atoi (3),
.BR atol (3),
.BR strtod (3),
.BR strtol (3),
.BR strtoul (3)