1. Arduino: For Loops

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3. Build this Circuit then Implement the Code
470W
digital I/O
pin 11
void setup(){
pinMode(11, OUTPUT);
for(int i=0; i<5; i++) {
digitalWrite(11,HIGH); delay(200);
digitalWrite(11,LOW); delay(200); }
void loop() {

4. These sketches both make the LED blink 5 times
without for statement
with for statement
void setup(){
pinMode(11, OUTPUT);
digitalWrite(11,HIGH); delay(200);
digitalWrite(11,LOW); delay(200); }
void loop() {
void setup(){
pinMode(11, OUTPUT);
for(int i=0; i<5; i++) {
digitalWrite(11,HIGH); delay(200);
digitalWrite(11,LOW); delay(200); }
void loop() {

5. How the for statement works
declare i as an integer (a number that can vary between -32,768 and 32,767)
the first value of i will be zero
continue to loop as long as i is less than 5
increment i each time through loop
i=0 the first time through loop
i=1 the second time through loop
i=2 the third time through loop
i=3 the fourth time through loop
i=4 the fifth time through loop
for(int i=0; i<5; i++) {
digitalWrite(11,HIGH); delay(200);
digitalWrite(11,LOW); delay(200); }

6. Incrementing for loops
for(int i=0; i<5; i++) { } • increment i by one each time (0,1,2,3,4)
for(int i=100; i>20; i--) { } • decrement i by one each time (100,99,98,…,22, 21)
for(int i=0; i<80; i+=2) { } • increment i by 2 each time (0,2,4,6,…,76,78)
for(int i=50; i>=0; i-=5) { } • decrement i by 5 each time (50,45,40,35,…,5,0)
for(int i=2; i<100; i=i*1.5) { } • multiply i by 1.5 each time (2,3,4,6,9,13,19,28,42,63,94)

7. Experiment with incrementing and decrementing for loops
void setup() {
Serial.begin(9600);
for(int x=0; x<100; x++) {
Serial.println(x); }
void loop() {
send output to serial monitor

8. Click here to get serial monitor to display
Play around…ideas for different patterns to display:
Click here to get serial monitor to display
1,2,3,…100
100,99,98,…-27
0,3,6,9,…69
1000,950,900,…50
1,2,4,8,16,…1024
1024,512,256,…1
1,4,9,16,25,…100