ATOF

Section: C Library Functions (3)
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BSD mandoc
 

NAME

atof - convert ASCII string to double  

SYNOPSIS

Fd #include <stdlib.h> Ft double Fn atof const char *nptr  

DESCRIPTION

The Fn atof function converts the initial portion of the string pointed to by nptr to double representation.

It is equivalent to:

strtod(nptr, (char **)NULL);
 

SEE ALSO

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

STANDARDS

The Fn atof function conforms to St -ansiC .  

BUGS

This manual page represents intent instead of actual practice. While it is intended that Fn atof be implemented using strtod(3), this has not yet happened. In the current system, Fn atof translates a string in the following form to a double: a string of leading white space, possibly followed by a sign (``+'' or ``-''), followed by a digit string which may contain one decimal point (``.''), which may be followed by either of the exponent flags (``E'' or ``e''), and lastly, followed by a signed or unsigned integer.


 

Index

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
STANDARDS
BUGS

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Time: 06:42:46 GMT, May 19, 2025