**Objective:** Given Number K, Print all the strings of N length.

**Example:**

N = 2, K = 3 [1, 1] [2, 1] [3, 1] [1, 2] [2, 2] [3, 2] [1, 3] [2, 3] [3, 3]

**Approach**:

This problem is quite similar to **Print All Subsets of a given set** and **Print All Combinations of subset of size K from Given Array**

- Loop through i = 1 to K.
- Add i to the result Array, which is the size N and make a recursive call to (N-1).
- Base case: when n becomes 0 (means array is full).
- See the code for better explanation.

**Code:**

**Output:**

[1, 1] [2, 1] [3, 1] [1, 2] [2, 2] [3, 2] [1, 3] [2, 3]