Sum of an arrayList

Question

I'm trying to make an average (moy) of an arrayList's column but I need to sum it first, I don't know how to do it

    int sumX = 0;
    val = new ArrayList<>();
    float moy[] = new float[3];

          if (i < 100) {
                    val.add(sensorEvent.values);
                i++;
            } else {
                for (; i > 0; i--);
                {
                    sumX = ?
                    moy[0] = sumX/100;
                }
                val.clear();
                i = 0;
}

Answer 1

You can use this code snippet: (Written in kotlin)

fun main() {
val s: List<Float> = listOf(1.2F, 1.4F, 5.6F) 
// populate it with your custom list data
var sum = 0F

s.forEach { it ->
    sum+=it
}
println("Sum = $sum and avg = ${sum/(s.size)}")

}

Well here is the java solution:

class Ideone
{
 public static void main (String[] args) throws java.lang.Exception
 {
    List<Float> s = new ArrayList(Arrays.asList(1.2F, 1.3F, 5.4F, 6.5F));
    Float sum = 0F;
    
    for (int i=0; i< s.size(); i++) {
        sum+=s.get(i);
    }
    
System.out.println("Sum: "+sum+" and Avg: "+sum/(s.size()));
}   
}