Added pizza_order.py to Python-Basic-to-Advance repo

Author: amratadev

pizza_order.py

@@ -0,0 +1,22 @@
+pizza_size=input("Which size of pizza do you want?")
+bill=0
+if pizza_size=='S' or pizza_size=='s':
+  bill+=100
+  print("Small pizza size is 100 Rs.")
+elif pizza_size=='M' or pizza_size=='m':
+  bill+=200
+  print("Medium pizza size is 200 Rs.")
+else:
+  bill+=300
+  print("Large pizza size is 300 Rs.")
+add_pepperoni=input("Do you want to add pepperoni(Y/N)?")
+if add_pepperoni=='Y'or add_pepperoni=='y':
+  if pizza_size=='S'or pizza_size=='s':
+    bill+=30
+  else:
+    bill+=50
+extra_cheese=input("Do you want extra cheese(Y/N)")
+if extra_cheese=='Y'or extra_cheese=='y':
+    bill+=20
+print(f"Your final bill is {bill}")
+