重复数字序列

Question

public static void main(String[] args){

int a;
for(a = 1; a < 100; a++){

    int r = a%7;

    System.out.println(r);

}

I wrote this down in Java to get a repeating sequence 1 2 3 4 5 6 0 1 2 3 4 5 6 . . . .

And what I am wondering is how to pick up and print out one of repeating nubmers in the sequence?

For example, how do I print out 3rd number in the repeating sequence?

Answer 1

Save the numbers in an array and then pick the desired one:

int[] arr = new int[100];
for (a = 1; a < 100; a++) {
    int r = a % 7;
    arr[a] = r;
}
int k = 3;
System.out.println(arr[k]); //print the number at index 3;

Answer 2

Simply use mod 7 of the desired index

 int yourIndex = 4;

 int yourResult = yourIndex % 7;

Also, always put spaces between operators! (eg. r = a % 7;)