using number with word

Projects Programming
1

Hello I dont know how to call this problem.
I wana use int in a int I know that sounds stupid but it would make my life easy.
To understand my problem here is the code:

int counter;
int led1;
int led2;
int led3;
void setup()
{
}

void loop(){

 for(int i=0;i<4;i++)
    { 
counter = i;
  led(here I wana put number i) = some stuff;




}

Thank you

2

You need to look at using arrays.

A slight problem in your example is that you go through the for loop four times, but you have only three
LEDs.

3

What they said ..., but here's an example of using arrays along with a few other confusing things.

#define NUM_ENTRIES(ARRAY)  (sizeof(ARRAY) / sizeof(ARRAY[0]))

const uint8_t   pinLED_1    = 13;   // CHANGE TO YOUR PIN NUMBER
const uint8_t   pinLED_2    = 13;   // CHANGE TO YOUR PIN NUMBER
const uint8_t   pinLED_3    = 13;   // CHANGE TO YOUR PIN NUMBER

const uint8_t   LED_OFF     = LOW;  // CHANGE TO YOUR 'OFF' STATE VALUE
const uint8_t   LED_ON      = HIGH; // CHANGE TO YOUR 'ON'  STATE VALUE

const unsigned long tmsONE_SECOND   = 1000UL;

// ... AN ARRAY OF I/O PINS ...
const uint8_t   pinsLEDS[]  = { pinLED_1, pinLED_2, pinLED_3 };

void loop()
{
    for ( size_t i = 0; i < NUM_ENTRIES(pinsLEDS); i++ )
    { 
        const uint8_t   state = digitalRead(pinsLEDS[i]);

        digitalWrite(pinsLEDS[i], ((LED_ON == state) ? LED_OFF : LED_ON));
    }

    delay(tmsONE_SECOND);
}

void setup()
{
    for ( size_t i = NUM_ENTRIES(pinsLEDS); i--; )
    {
        pinMode(pinsLEDS[i], OUTPUT);

        digitalWrite(pinsLEDS[i], LED_OFF);
    }
}