Merge pull request geekcomputers#1323 from RohitSgh/patch-2

Update and rename Prime_number to Prime_number.py

Author: geekcomputers

Prime_number

@@ -0,0 +1,18 @@
+import math
+while True:
+    try:
+        num = int(input("Enter a Number: "))
+        break
+    except ValueError:
+        print("Invalid Input")
+
+if num > 1:
+    for i in range(2,int(math.sqrt(num))):  #Smallest Prime Factor of a Composite Number is less than or equal to Square Root of N
+        if (num % i) == 0:
+            print(num,"is NOT a Prime Number. It's indeed a COMPOSITE NUMBER")
+            break
+    else:
+        print(num,"is a PRIME NUMBER ")
+     
+else:
+    print(num,"is NOT a Prime Number")