public class FindRange {

/**

* find the smallest value in the parameter array, and find the largest value, and

* return the largest value minus the smallest value. If the array has length 0, return -1.

* int[] myIntArray = {1, 0, 2, 3, -1, 2};

*/

public class User {

public int getRange(int[] intArray) {

int size = intArray.length; //size 6

if (size == 0) {

return -1;

}

int smallestNum = intArray[0]; // smallestNum = 1

int largestNum = intArray[0];

for (int i = 1; i < size; i++) {

if (intArray[i] < smallestNum) {

smallestNum = intArray[i];

}

if (intArray[i] > largestNum) {

largestNum = intArray[i];

}

}

return largestNum - smallestNum;

}

}

}