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atof
====

Syntax
------

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

Description
-----------

Convert as much of the string as possible to an equivalent double
precision real number.

This function is almost like `strtod(string, NULL)' (strtod:.).   

Return Value
------------

The equivalent value, or zero if the string does not represent a number.

Example
-------

     main(int argc, char **argv)
     {
       double d = atof(argv[1]);
       ...