Arduino Workshop - Chapter Three - FOR Loops

In this section, you'll look at 'for' loops which you can use to control the flow of your program.

[geoffwade]

I’ve just discovered your channel and really like it, good job.

[johnnagy]

I don't want to ramp up and down. Just want to blink the led 5 times. Stop. And wait for a Button push again. Any videos on that??

[infatum]

I think they chose i for for loops because it stands for iterations.

[puvaneswaransivakumar]

Can I know how to loop forever the melody example in arduino??

[timwhite]

Nice. fyi, 'i' is used for convention in loops to indicate "iterations".

[whitefields]

As you only want to count 0-255 would you save memory if you defined i as a BYTE datatype rather than an INT?

[scopellafranqui]

I've had to change "int i" for "int i = 0" in my first for loop otherwise each loop starts with i having a value of 255. i.e. if I don't add "int i = 0" the LED starts each loop at max brightness then fades instead of ramping up then fading.

[tareksma]

Thanks for sharing. I finally understood the for loop. Now I kinda feel dump for not being able to understand it sooner 🙃 😕

[Perdonadoooooo]

In case someone else's LED only ramps down and not up, write "for(int i=0; i < 256; i++)" instead of the first _for_ shown in the video. Mine behaved like so and with that correction it now works properly. I'm guessing "int i" doesn´t declare AND set the variable to 0, so that's why it only ramped down. Someone correct me if im wrong

[salc]

Thank you for posting this video, it has been a great help in my learning of Arduino coding.  I would like to ask if I wanted to have this LED ramp 5 times would I add the first part of the code you show at min: 0:20 around the ramp code by using curly bracket? Thank you again for posting these videos.

[geneh]

What does the statement "for(;;);" do? I've seen it in a couple of example sketches. Thanks.

[firealarmswithcolton]

my brother told me i need a for loop for a buzzer tone sequence on an if but this video made no sense to me.

[vinothparker]

void setup()
{
Serial.begin(9600);
}

void loop()
{
int i;

for(i; i<100; i++)
{
Serial.println(i);
delay(1000);
}
}



i tried to print value from 0 to 100.. but the initial value of i is 52 instead of 0.. i don't know why its behaving like this. please some one help me.

[danieljohnsopardenilla]

So a 'for' is like a sub loop?

[jean_pattat]

i had troble with this so i watched other videos and i found the error you must be plugged in with a digital pwd most bords have these and are marked with a ~

[-stoner]

I'm trying to make a game where LED's blink back and forth and when you press a button it stops on the LED it's on and gives a certain point value for each LED but the for loop keeps iterating and blinking the LEDs

[omtandon]

I searched this on youtube for the same thing!!!

[Chriss.lindstrom]

How do I make the code jump out of the 'for' loop? As soon as it counts to 5 for me, it starts over at 0 and jumps straight back into the loop. I want the value of x to stay at 5 until I press a button.

[ryanbennett]

If this doesn't work for you then make sure you are using the digital pins (NOT analog).