move python file to assignments

assignments/icecream.py

@@ -0,0 +1,14 @@
+def ask_yes_no(prompt):
+    while True:
+        answer = input(prompt + ' (y or n) ')
+        if answer == 'y' or answer == 'Y':
+            return True    # returning ends the function
+        if answer == 'n' or answer == 'N':
+            return False
+        print("Answer 'y' or 'n'.")
+
+if ask_yes_no("Do you like ice cream?"):
+    print("You like ice cream!")
+else:
+    print("You don't like ice cream.")
+