char s[9];

Howdy,
I was working on this exercise:
http://learn.parallax.com/propeller-c-simple-circuits/seven-segment-display
and at the bottom the second code example has the line "char s[9];" and I was just wondering what's it for? I removed it and it works fine...

/*
  Seven Segment.c
  
  Display digits on a 7 segment (common cathode) LED display.
  
  http://learn.parallax.com/propeller-c-simple-circuits/seven-segment-display
*/

#include "simpletools.h"                      // Include simpletools

int n[] = {0b11100111, 0b10000100, 0b11010011,
           0b11010110, 0b10110100, 0b01110110,
           0b01110111, 0b11000100, 0b11110111,
           0b11110100};
char s[9];

int main()                                    // main function
{
  set_directions(15, 8, 0b11111111);          // P15...P8 -> output
  pause(1000);

  for (int i = 0; i < 10; ++i)
  {                                              
  set_outputs(15, 8, n[i]);             // 0 -> 7-segment display
    print("n[%d] displayed.\n", i);
  pause(1000);
  }
}