Arduino code to serial print the 10th number stored in a array of 100 number.

Projects Programming
1

hi,

I'm totally new to this so can anybody help me in creating a code to serial print the 10th number stored in a array of 100 numbers. The numbers can be anything received from the tx pin from arduino.

Thanks in advance

2

The modulo operator (%) is what you need

Take ideas from this

//original array 
//byte anArray[] = {11, 22, 33, 44, 55, 66, 77, 88, 99, 0, 123, 234, 345, 456, 789, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0};

//array amended following comments about the values used
int anArray[] = {11, 22, 33, 44, 55, 66, 77, 88, 99, 0, 123, 234, 345, 456, 789, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0};

byte numberOfElements = sizeof(anArray);

void setup()
{
  Serial.begin(115200);
  Serial.println(numberOfElements);
  for (int x = 0 ; x < numberOfElements; x++)
  {
    if ((x % 5) == 0)
    {
      Serial.print(x);
      Serial.print(" : ");
      Serial.println(anArray[x]);
    }
  }
}

void loop()
{
}
3

Bob:

Your byte array has values greater than 255, which I don't think will work. Also, to see each 10th element of the array, shouldn't the test be:

if ((x % 10 == 0 && x != 0) {

4

9%10 == 0 ?

5

If you just want to print an element of your array. This would work. Arrays start at zero so that is why one is subtracted from arrayElement

int arrayElement=9;

Serial.println(yourArrayName[arrayElement-1];
6

Or you could, of course, simply do

for (int x = 0; x < arraySize; x += 10)

Actually, looking closer at the thread title it seems that the OP may only want to print one element anyway !

7

UKHeliBob:
Or you could, of course, simply do

for (int x = 0; x < arraySize; x += 10)

Actually, looking closer at the thread title it seems that the OP may only want to print one element anyway !

Wouldn't that print the 1st, 11th, 21st,...91st elements?

8

evanmars:
Wouldn't that print the 1st, 11th, 21st,...91st elements?

Yes, but as I said in reply #5 I only just realised that the OP seems only to want to print one element anyway.

Sorry to have caused confusion but I am not having the best of days !

9

venkatesh223:
I'm totally new to this so can anybody help me in creating a code to serial print the 10th number stored in a array of 100 numbers.

int Array[100];
Serial.print(Array[9]);  // Indexes start at 0 so index 9 is the 10th number.