python3的练习----求素数

python3的练习

for n in range(2,10):
    for x in range(2,n):
        if n % x == 0:
            print(n,'equals',x,'*',n//x)
            break
    else:
        print(n,'is a prime number')


2 is a prime number
3 is a prime number
4 equals 2 * 2
5 is a prime number
6 equals 2 * 3
7 is a prime number
8 equals 2 * 4
9 equals 3 * 3