{{keywords>wiki library source code example reference}}
===== strtod =====
<code c>
    #include <stdlib.h>
    double strtod(const char *str, char **endptr);
</code>
strtod converts a string into a double variable

===== strtod c code example =====  
<code c>
/* 
 * strtod example code
 * http://code-reference.com/c/stdlib.h/strtod
 */
#include <stdio.h>
#include <stdlib.h>

int main ( void )
{
  char string[] ="2040 strtod string 5";
  char *endptr;
  double number;

  number = strtod(string, &endptr);
  printf("String is %s\n",string);
  printf("Double is %f\n", number);

  return 0;
}
</code>

==== Output ====

    user@host:~$  ./strtod 
    String is 2040 strtod string 5
    Double is 2040.000000