Write the statement "A quadrilateral is a parallelogram if its diagonals bisect each other" in 'if-then' form.

Question

$\begin{array}{1 1} \text{If the diagonals of a quadrilateral bisect each other then it is a parallelogram.} \\ \text{The diagonals of a quadrilateral bisect each other if it is a parallelogram.}\end{array} $