add prime number method

Author: emre

solutions/prime_number/__init__.py

@@ -0,0 +1,12 @@
+def is_prime(number):
+    """
+    Checks a number is a prime or not.
+    Returns bool.
+    """
+    if number < 2:
+        return False
+    for i in range(2, number):
+        if number % i == 0:
+            return False
+
+    return True

solutions/prime_number/prime.py

@@ -0,0 +1,4 @@
+from prime import is_prime
+
+
+# some code testing is_prime...