void setup() {
  Serial.begin(9600); 
}
 
void loop() {
  char ch; // declares the variable

  // print labels
  Serial.print("letter");  // the label
  Serial.print("\t\t");         // prints a tab
 
  Serial.print("DEC");
  Serial.print("\t");

 
  Serial.print("BIN");
  Serial.println();        // signals the end of the line
 
  for (ch = 'a'; ch <= 'z'; ch++) { // I want values from a to z
    Serial.print(ch);       // print as decimal
    Serial.print("\t\t");  // prints two tabs to spesify label lenght
 
    Serial.print(ch, DEC);  // print as an ASCII-encoded decimal
    Serial.print("\t");    // prints a tab
 
    Serial.println(ch, BIN);  // print as an ASCII-encoded binary
    // after printing goes to a new line with "println"
    delay(200);            // delay 200 milliseconds
  }
  Serial.println();        // prints another carriage return
}