Lesson 57: Using Array and Loop with Arduino

Please select other codes for this lecture from the links below.

Part 6: Arduino Practial Programming

In this lesson we learn how what an array is and how to define it. Please watch full details video. list of tipcs listed below.
Code in this page: reading age and marks.

00:00 what is array?
02:52 Reading Array values
04:41 Updating array values
06:44 Defining empty array : integer
08:31 Defining empty array: float
10:58 Working with loops
15:30 Reading values of array (code in this page)
16:51 Demo: Reading values
17:34 filling up an array with float data type
18;48 reading and printing each element of array
19:55 Project: 4 LEDs with array
21:22 Project: wiring
23:26 demo: 4 LEDs
23:46 demo 2: 4 LEDs
24:05 code: 2
24:51 Comparing two codes


  int age[] = { 25, 21, 23, 30 } ;

void setup() {
  Serial.begin(9600);// initialize serial monitor
  
 Serial.println(age[1]);// print value of age of index 1 (prints 21)
 Serial.println(age[0]);// print value of age of index 0 (prints 25)
 Serial.println(age[2]);// print value of age of index 2 (prints 23)
 Serial.println(age[3]);// print value of age of index 3 (prints 30) 
 Serial.println("=============");   
 
 age[1] = 42;
 age[3] = 22;
 age[0] = 18;
 age[2] = 20; 

 Serial.println(age[1]);// print value of age of index 1 (prints 42)
 Serial.println(age[0]);// print value of age of index 0 (prints 18)
 Serial.println(age[2]);// print value of age of index 2 (prints 20)
 Serial.println(age[3]);// print value of age of index 3 (prints 22)   
 Serial.println("============="); 
 // defining emptry array for 4 falues
 // age[] has been used above so we can't re-define it.
 // we have use new name. I am using marks.
 float marks[4];// 
 marks[0]= 49.5;
 marks[1]= 45.7;
 marks[2]= 36.2;
 marks[3]= 40.7; 
  
 Serial.println(marks[1]);// print value of marks of index 1 (prints 45.7)
 Serial.println(marks[0]);// print value of marks of index 0 (prints 49.5)
 Serial.println(marks[2]);// print value of marks of index 2 (prints 36.2)
 Serial.println(marks[3]);// print value of marks of index 3 (prints 40.7)     
}

void loop() {
    

}