how to prevent letters breaking an int java code example

Example: how to not allow a user to enter a mark greater than 100 or below 0 in java

int[] cw_Mark = new int[6];
    for (int i = 0; i < cw_Mark.length; i++) {
        if (i >= 0 || i <= 100) {
            System.out.println("Please Enter Your Module " + (i+1) + " Coursework Mark: ");
            cw_Mark[i] = input.nextInt();
        } else {
            System.out.println("Please Enter a Number Between 1 and 100");
        }
    }