Why is it now that in the for loop "x<myArr.length" not "x<=myArr.length"? Why does it show a error when implemented?

Question

public class Program {
public static void main(String[] args) {
int [ ] myArr = {6, 42, 3, 7};
int sum=0;
for(int x=0; x<myArr.length; x++) {
sum += myArr[x];
}
System.out.println(sum);
}
}

Answer 1

the arrays always start from index 0 and end in length-1, so when the code says <=...length you have an indexOutOfRange exception, you shoul keep the < only or use ...length-1

Answer 2

The elements of ur array starts at 0 and go thru 3.
myArr.length=number of elements=4, which is out of range of the array, when using <=

Answer 3

Because the index of an array starts with 0