// relates to this Aarduino-Forum-thread https://forum.arduino.cc/t/how-to-decrement-a-variable-in-every-line-of-a-loop/1265739/32
// this is the WOKWI-Link: https://wokwi.com/projects/399298310078465025

// "byte" is the datatype of the array
// "myPhoneDigits" is the name of the array 
// the "4" defines how many elements the array shall have
byte myPhoneDigits[4]; // declaring an array of byte with 4 elements named "myPhoneDigits"

void setup() {
  // make sure to adjust baudrate of the 
  //Arduino-IDE serial monitor to 115200 baud
  Serial.begin(115200); 
  Serial.println( F("Setup-Start") );

  // store values in each array-element
  myPhoneDigits[0] = 4; // element  1 which has index nr 0
  myPhoneDigits[1] = 9; // element  2 which has index nr 1
  myPhoneDigits[2] = 5; // element  3 which has index nr 2
  myPhoneDigits[3] = 1; // element  4 which has index nr 3

  Serial.println();
  Serial.println();
  Serial.println("all phone-digits printed as fixed characters");
  Serial.println("Index-Nr   0123");
  Serial.println("the digits 4951");
  Serial.println();
  Serial.println("now printed in a for-loop");

  Serial.print("the digits ");

  for (int i = 0; i < 4; i++) { // count up 0 to 3
    Serial.print(myPhoneDigits[i]); // print content of each array-element
  }
  
  Serial.println();
  Serial.println();
  Serial.println("now printing with explanation");
  Serial.println("each array-element and its content");

  for (int i = 0; i < 4; i++) { // count up 0 to 3
    Serial.print("array-element myPhoneDigits[");
    Serial.print(i); // print index-number
    Serial.print("] holds value ");
    Serial.println(myPhoneDigits[i]); // print content of each array-element
  }
  
  Serial.println("Scroll back serial monitor to read all printed lines");
}


void loop() {
}