试图在数组中找到最小值

Question

I have an array with ten values and I am looking to loop through the array and store the lowest value in a variable but I keep getting 0.0 outputted even though the smallest number is 3 .

Here is my attempt:

  static void  lowestStudentAvgMark() {
    double [] averagesArray = new double[10];
    for(int i = 0; i < 9; i++) {
      double total = (studentMarksArray[i][0]+studentMarksArray[i][1]+studentMarksArray[i][2])/3;
      averagesArray[i] = total;
    }
    double min = averagesArray[0];
    for (int counter = 1; counter < averagesArray.length; counter++) {
      if (averagesArray[counter] < min) {
        min = averagesArray[counter];
      }
    }
    System.out.println(min);
  }

Answer 1

Your first for loop read 1 less, than actual number. So, the last index value of averagesArray is 0 . So, you got minimum number as 0 .

for(int i = 0; i< averagesArray.length; i++){ //Use averagesArray.length

   double total = (studentMarksArray[i][0]+
             studentMarksArray[i][1]+studentMarksArray[i][2])/3;
      averagesArray[i] = total;
}

Answer 2

Use the length of the array to loop-

for(int i = 0; i < averagesArray.length; i++) {

}

It will read from 0 'til the length. You used i < 9 when your array has a size of 10.