Java - summing up Array list values

I am building an array that ask how many different inputs you have, then allowing you to enter each input. At the end I want to sum them up, but I keep getting an error.
Also when I go above 5 inputs, I lose one..... For example when I respond to the first question: Enter "10". When I start adding different numbers in it stops at nine. Please help.

public static void main(String[] args) {
Scanner input = new Scanner(System.in);

    System.out.println("Please enter the number of courses you have left: ");

    int size = input.nextInt();
    int[] numArr = new int[size];
    System.out.println("Enter the number of CUs for each course: ");
    for (int i=0; i    {
        numArr[i] = input.nextInt();
    }
    int totalSum = numArr + totalSum;
    System.out.print("The sum of the numbers is: " + totalSum);

Answer

Change your logic and code to the following:

Scanner input = new Scanner(System.in);

System.out.println("Please enter the number of courses you have left: ");
int size = input.nextInt();
System.out.println("Enter the number of CUs for each course: ");
int totalSum = 0;
for (int i = 0; i < size; i++) {


    totalSum+=input.nextInt();
}

System.out.print("The sum of the numbers is: " + totalSum);