Conditionals- IF/Else

/*

 Conditionals - If statement

 This example demonstrates the use of if() statements.

 It reads the state of a potentiometer (an analog input) and turns on an LED

 only if the potentiometer goes above a certain threshold level. It prints the

 analog value regardless of the level.

 The circuit:

 - potentiometer

   Center pin of the potentiometer goes to analog pin 0.

   Side pins of the potentiometer go to +5V and ground.

 - LED connected from digital pin 13 to ground through 220 ohm resistor

 - Note: On most Arduino boards, there is already an LED on the board connected

   to pin 13, so you don't need any extra components for this example.

 created 17 Jan 2009

 modified 9 Apr 2012

 by Tom Igoe

 This example code is in the public domain.

 https://docs.arduino.cc/built-in-examples/control-structures/ifStatementConditional/

*/

// These constants won't change:

const int analogPin = A0;   // pin that the sensor is attached to

const int ledPin = 13;      // pin that the LED is attached to

const int threshold = 400;  // an arbitrary threshold level that's in the range of the analog input

void setup() {

 // initialize the LED pin as an output:

 pinMode(ledPin, OUTPUT);

 // initialize serial communications:

 Serial.begin(9600);

}

void loop() {

 // read the value of the potentiometer:

 int analogValue = analogRead(analogPin);

 // if the analog value is high enough, turn on the LED:

 if (analogValue > threshold) {

   digitalWrite(ledPin, HIGH);

 } else {

   digitalWrite(ledPin, LOW);

 }

 // print the analog value:

 Serial.println(analogValue);

 delay(1);  // delay in between reads for stability

}