Rewrite the following statement with "if-then" in five different ways conveying the same meaning. If a natural number is odd then its square is also odd.

The given statement can be written in five different ways as follows
(i) A natural number is odd implies that its square is odd
(ii) A natural number is odd only if its square is odd
(iii) For a natural number to be odd it is necessary that its square is odd
(iv) For the square of a natural number to be odd it is sufficient that the number is odd
(v) If the square of a natural number ls not odd then the natural number is not odd