{{keywords>wiki library source code example reference}}
===== strtoul =====
<code c>
    #include <stdlib.h>
    unsigned long int strtoul(const char *str, char **endptr, int base);
</code>
strtoul Converting a string to an unsigned long integer\\
str: the string to be converted\\
endptr: address of a pointer variable that points to the last character read, so the character that is not owned by a number\\
base: base between 2 and 36\\
\\
Be found unprefixed numbers, these numbers in base 10 are accepted.\\
If the base '0 'is specified, the strings make a reference to the basis used\\
(leading "0x" for hexadecimal, "0" for octal, numbers).\\


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

int main ( void )
{
  char string[] ="20405";
  char *endptr;
  unsigned long int number;

  number = strtoul(string, &endptr, 10);
  printf("string is %s\n",string);
  printf("unsigned long int is %li\n", number);

  return 0;
}
</code>

==== Output of strtoul example ====

    user@host:~$ ./strtoul
    string is 20405
    unsigned long int is 20405