What is the object of game in sudoku?

The object of Sudoku is to fill a 9x9 grid with digits so that:

* Each row contains all digits from 1 to 9.

* Each column contains all digits from 1 to 9.

* Each of the nine 3x3 subgrids (also called "blocks" or "regions") contains all digits from 1 to 9.

Essentially, you need to place the numbers 1 through 9 in each row, column, and 3x3 square without repeating any number within that row, column, or square.