Why do I need to put result = 0; in order to get correct result!

Question

Problem:

Find the sum of an array

Solution (Code):

class Abshihek {
public static void main(String[] args) {
int result;
int[] arr1 = {1, 2, 3, 4, 5};
for(int i = 0; i < arr1.length; i++) {
result += arr1[i];
}
System.out.println(result);
}
}

Answer 1

because you declared result as an integer variable. THEN you try and add something to it.
Once you declare a variable, it doesn't mean it has value, you need to give it one before trying to preform operations on it