PROGMEM example

#include <avr/pgmspace.h>
 char buffer [5];
 word serialCount;
void setup(void)
{
    Serial.begin(38400);
    Serial.println("\nPress space bar .");
//    while (Serial.read() != 32)   delay(1); // Wait for space
 
}
const int mydata[10][10] PROGMEM = {
    '0', '1', '2', '3', '4', '5', '6', '7', '8', 'A',
    '1', '1', '2', '3', '4', '5', '6', '7', '8', 'B',
    '2', '1', '2', '3', '4', '5', '6', '7', '8', 'C',
    '3', '1', '2', '3', '4', '5', '6', '7', '8', 'D',
    '4', '1', '2', '3', '4', '5', '6', '7', '8', 'E',
    '5', '1', '2', '3', '4', '5', '6', '7', '8', 'F',
    '6', '1', '2', '3', '4', '5', '6', '7', '8', 'G',
    '7', '1', '2', '3', '4', '5', '6', '7', '8', 'H',
    '8', '1', '2', '3', '4', '5', '6', '7', '8', 'I',
    '9', '1', '2', '3', '4', '5', '6', '7', '8', 'Z' };

void loop(void) {
    int i,j;
    byte n;
    Serial.println("\nData by Rows.");
    for (i=0; i < 100;i++) {
  // Serial.println(" ");
        if ((i %8)==0) Serial.print("|");
        if ((i %16)==0) Serial.println("");
   n = pgm_read_byte_near(i);
 // Serial.print(n, HEX);
          Serial.print(" ");
          sprintf(buffer, "%02x", n);
          Serial.print(buffer);
          serialCount++;
          
         // Serial.print("\t"); 
     }
    
    Serial.println(" ");
    Serial.println("\nData by Columns.");
    for (i=0; i < 10; i++) {
   Serial.println(" ");
   for (j=0; j < 10; j++) {
  n = pgm_read_word_near(&mydata[j][i]);
  Serial.print(n, BYTE);
   }
    }
    Serial.println(" ");    setup();    Serial.println(" ");  //start over
}