isPrime

$*$ Purpose: determine if n is a prime number

$*$ Paramaters: int n

$*$ Returns: boolean $-$ true if n is prime, false otherwise

$*$ Pre$-$conditions: n $>1$

$*$

$*$ Note: A prime number is a whole number greater

$*$ than $1$ whose only factors are $1$ and itself

$*$

$*$ HINT: This method can be completed in $1$ line.

$*/$

$//$ TODO: write the isPrime method here