(:source http://arduino.cc/en/pub/code/master/build/shared/examples/05.Control/ForLoopIteration/ForLoopIteration.ino lang=arduino tabwidth=4:)

(:source http://arduino.cc/en/pub/code/master/build/shared/examples/5.Control/ForLoopIteration/ForLoopIteration.ino lang=arduino tabwidth=4:)

(:source http://arduino.cc/en/pub/code/new-extension/build/shared/examples/5.Control/ForLoopIteration/ForLoopIteration.ino lang=arduino tabwidth=4:)

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For Loop (aka The Knight Rider)

For Loop

See Also:

Often you want to iterate over a series of pins and do something to each one. For instance, this example blinks 6 LEDs attached the Arduino by using a for() loop to cycle back and forth through digital pins 2-7. The LEDS are turned on and off, in sequence, by using both the digitalWrite() and delay() functions .

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(:source http://arduino.cc/en/pub/code/master/build/shared/examples/5.Control/ForLoopIteration/ForLoopIteration.pde lang=arduino tabwidth=4:)

Often you want to iterate over a series of pins and do something to each one. For instance, this example blinks 6 LEDs attached the Arduino by using a for() loop to cycle back and forth through digital pins 2-7. The LEDS are turned on and off, in sequence, by using both the digitalWrite() and delay() functions .

In the main loop of the code, two for() loops are used to loop incrementally, stepping through the LEDs, one by one, from pin 2 to pin seven. Once pin 7 is lit, the process reverses, stepping back down through each LED.

Often you want to iterate over a series of pins and do something to each one. For instance, this example blinks 6 LEDs attached the Arduino by using a for() loop to cycle back and forth through digital pins 2-7. The LEDS are turned on and off, in sequence, by using both the digitalWrite() and delay() functions .

Often you want to iterate over a series of pins and do something to each one. For instance, this example blinks 6 LEDs attached the Arduino by using a for() loop to cycle back and forth through digital pins 2-7. The LEDS are turned on and off, in sequence, by using both the [Reference/digitalWrite | digitalWrite()]] and delay() functions .

This example makes use of 6 LEDs connected to the pins 2 - 7 on the board using 220 Ohm resistors. The sketch makes the LEDs blink in a sequence, one by one using only digitalWrite() and delay() .

This example makes use of 6 LEDs connected to the pins 2 - 7 on the board using 220 Ohm resistors. The sketch makes the LEDs blink in a sequence, one by one using only * digitalWrite() and * delay() .

Often you want to iterate over a series of pins and do something to each one. For instance, this example blinks 6 LEDs, one by one, attached the Arduino by using a for() loop to cycle back and forth through digital pins 2-7.

Often you want to iterate over a series of pins and do something to each one. For instance, this example lights 6 LEDs attached the Arduino by using a for() loop to cycle back and forth through digital pins 2-7.

• for()

• delay()

• ForLoop - Control multiple LEDs with a For Loop.
• WhileLoop - Use a While Loop to calibrate a sensor while a button is being pressed.
• SwitchCase - Choose between a number of discrete values in a manner that is the equivalent of using multiples If statements. This example shows how to divide a sensor's range into a set of four bands and to take four different actions depending on which band the result is in.

• Forloop? - Control multiple LEDs with a For Loop.
• Whileloop? - Use a While Loop to calibrate a sensor while a button is being pressed.
• Switchcase? - Choose between a number of discrete values in a manner that is the equivalent of using multiples If statements. This example shows how to divide a sensor's range into a set of four bands and to take four different actions depending on which band the result is in.

Connect six LEDS, with 220 ohm resistors in series, to digital pins 2-7 on your Arduino.

The code below begins by utilizing a for() loop to assign digital pins 2-7 as outputs for the 6 LEDs used.

In the main loop of the code, two for() loops are used to loop incrementally, turning on the LEDs, one by one, connected to lowest pin to the highest.

(:source http://arduino.cc/en/pub/code/master/build/shared/examples/5.Control/ForLoopIteration/ForLoopIteration.pde language=arduino tabwidth=4:)

Hardware Required

• Arduino Board
• (6) 220 ohm resistors
• (6) LEDs
• hook-up wire
• breadboard

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• if()
• if...else
• analogRead()
• digitalWrite()
• serial.begin()
• serial.print()

• For Loop? - Control multiple LEDs with a For Loop.
• While Loop? - Use a While Loop to calibrate a sensor while a button is being pressed.
• Switch Case? - Choose between a number of discrete values in a manner that is the equivalent of using multiples If statements. This example shows how to divide a sensor's range into a set of four bands and to take four different actions depending on which band the result is in.
• Array: a variation on the For Loop example that demonstrates how to use an array.

 (:source http://arduino.cc/en/pub/code/master/build/shared/examples/5.Control/ForLoopIteration/ForLoopIteration.pde language=arduino tabwidth=4:)

 (:source http://arduino.cc/en/pub/code/master/build/shared/examples/Control/ForLoopIteration/ForLoopIteration.pde language=arduino tabwidth=4:)

   for (int thisPin = 2; thisPin < 8; thisPin++) { 

image developed using Fritzing. For more circuit examples, see the Fritzing project page

For Loop

   for (int thisPin = 0; thisPin < 8; thisPin++) { 

   for (int thisPin = 7; thisPin >= 2; thisPin--) { 

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Examples > Control Structures

For Loop and Arrays

(aka Knight Rider)

Often you want to iterate over a series of pins and do something to each one. For example, this example lights up a series of LEDs attached to pins 2 through 7 of the Arduino.

We also call this example "Knight Rider" in memory of a TV-series from the 80's where David Hasselhoff had an AI machine named KITT driving his Pontiac. The car had been augmented with plenty of LEDs in all possible sizes performing flashy effects. In particular, it had a display that scanned back and forth across a line, as shown in this exciting fight between KITT and KARR. This example duplicates the KITT display.

This example makes use of 6 LEDs connected to the pins 2 - 7 on the board using 220 Ohm resistors. The sketch makes the LEDs blink in a sequence, one by one using only digitalWrite(pinNumber,HIGH/LOW) and delay(time).

Circuit

click the image to enlarge

Schematic:

click the image to enlarge

Code

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 /*
   For Loop Iteration
  
  Demonstrates the use of a for() loop. 
  Lights multiple LEDs in sequence, then in reverse.
  
  The circuit:
  * LEDs from pins 2 through 7 to ground
  
  created 2006
  by David A. Mellis
  modified 5 Jul 2009
  by Tom Igoe 
  
  http://www.arduino.cc/en/Tutorial/ForLoop
  */

 int timer = 100;           // The higher the number, the slower the timing.

 void setup() {
   // use a for loop to initialize each pin as an output:
   for (int thisPin = 2; thisPin < 8; thisPin++)  {
     pinMode(thisPin, OUTPUT);      
   }
 }

 void loop() {
   // loop from the lowest pin to the highest:
   for (int thisPin = 0; i < 8; thisPin++) { 
     // turn the pin on:
     digitalWrite(thisPin, HIGH);   
     delay(timer);                  
     // turn the pin off:
     digitalWrite(thisPin, LOW);    
   }

   // loop from the highest pin to the lowest:
   for (thisPin = 7; thisPin >= 2; thisPin--) { 
     // turn the pin on:
     digitalWrite(thisPin, HIGH);
     delay(timer);
     // turn the pin off:
     digitalWrite(thisPin, LOW);
   }
 }

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