Partially Filled Arrays

• Array length = maximum number of elements in array
• Usually, array is partially filled
• Need companion variable to keep track of current size
• Uniform naming convention:
  final int DATA_LENGTH = 100;
  double[] data = new double[DATA_LENGTH];
  int dataSize = 0;
• Update dataSize as array is filled:
  data[dataSize] = x;
  dataSize++;