expected identifier

Hi, I've been playing around with this idea of program which probably has been made already million times but i cant get mine working for some reason, its supposed to write numbers 1 to 10000 for now just with printf, but the idea is to get it to write it to textfile and in format: 00000 00001 00002 00003 and so on...

Code:

---

#include <stdio.h>

int ruu = 10000;
int var = 0;
 
while (var <= ruu)
{
 printf(var);
 var++;
}

---

my compiler says:
error: expected identifier or '(' before 'while'
Compilation failed.

also, I'm on ubuntu 10.04 using Geany.

No main procedure?

Code:

---

#include <stdio.h>

int main (void) {
    int ruu = 10000;
    int var = 0;
    while (var <= ruu)
    {
        printf("%i\n", var);
        var++;
    }
}

---

Now it compiles but still gives:
in function 'main':
warning: control reaches end of void function

what does this mean?

He did not explicitly add a return statement. Under C99, this is ok, but under C89, you must include a return:

Code:

---

#include <stdio.h>

int main (void) {
    int ruu = 10000;
    int var = 0;
    while (var <= ruu)
    {
        printf("%i\n", var);
        var++;
    }
return 0;
}

---

Put a return 0 at the end too.

Thanks alot for the help, now it compiles and builds with no errors or warnings, it worked fine before adding the "return 0" but i prefer to learn these things properly :)