Create Prime Number Checker program

Day008/PrimeNumberChecker/prime.py

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+# Prime Number Checker
+# Author: Powell A. Mims
+# This program checks if a number is prime or not
+
+def is_prime(num):
+    if num == 4:            # 4 / 2 = 2 --> range(2, 2) is empty. Skips
+        return False;       # for loop and causes erroneous true return.
+    max = int(num / 2);
+    for i in range(2, max):
+        if num % i == 0:
+            return False;
+    return True;
+
+print("\nWelcome to the Prime Number Checker!\n");
+number = input("What number should we check? ");
+
+if not number.isnumeric():
+    print("This program only works on integers.");
+    exit();
+
+number = int(number);
+if is_prime(number):
+    message = "";
+else:
+    message = " not";
+
+print(f"This number is{message} prime.\n");