Get Exponent

1. Write a method named getExponent(n, p) that returns the largest exponent x such that px evenly divides n. If p is <= 1 the method should return -1.

For example, getExponent(162, 3) returns 4 because 162 = 21 * 34, therefore the value of x here is 4.

The method signature is
int getExponent(int n, int p)

Examples:

if n is
and p is
return
because
27
3
3
33 divides 27 evenly but 34 does not.
28
3
0
30 divides 28 evenly but 31 does not.
280
7
1
71 divides 280 evenly but 72 does not.
-250
5
3
53 divides -250 evenly but 54 does not.
18
1
-1
if p <=1 the function returns -1.
128
4
3
43 divides 128 evenly but 44 does not.