Updated billing

billing.py

@@ -1,3 +1,70 @@
-prices = [12.99, 5.49, 8.75]
-total = sum(prices)
-print(total)
+updated_billing
+items= {"apple":5,"soap":4,"soda":6,"pie":7,"cake":20}
+total_price=0
+try :
+    print("""
+Press 1 for apple
+Press 2 for soap
+Press 3 for soda
+Press 4 for pie
+Press 5 for cake
+Press 6 for bill""")
+    while True:
+        choice = int(input("enter your choice here..\n"))
+        if choice ==1:
+            print("Apple added to the cart")
+            total_price+=items["apple"]
+
+        elif choice== 2:
+            print("soap added to the cart")
+            total_price+= items["soap"]
+        elif choice ==3:
+            print("soda added to the cart")
+            total_price+=items["soda"]
+        elif choice ==4:
+            print("pie added to the cart")
+            total_price+=items["pie"]
+        elif choice ==5:
+            print("cake added to the cart")
+            total_price+=items["cake"]
+        elif choice  == 6:
+            print(f"""
+
+Total amount :{total_price}
+""")
+            break
+        else:
+            print("Please enter the digits within the range 1-6..")
+except:
+    print("enter only digits")
+
+"""
+Code Explanation:
+A dictionary named items is created to store product names and their corresponding prices.
+Example: "apple": 5 means apple costs 5 units.
+
+one variable is initialized:
+
+total_price to keep track of the overall bill.
+
+
+A menu is printed that shows the user what number to press for each item or to generate the final bill.
+
+A while True loop is started, meaning it will keep running until the user explicitly chooses to stop (by selecting "6" for the bill).
+
+Inside the loop:
+
+The user is asked to enter a number (1–6).
+
+Depending on their input:
+
+If they enter 1–5, the corresponding item is "added to the cart" and its price is added to the total_price.
+
+If they enter 6, the total price is printed and the loop breaks (ends).
+
+If they enter something outside 1–6, a warning message is shown.
+
+The try-except block is used to catch errors if the user enters something that's not a number (like a letter or symbol).
+In that case, it simply shows: "enter only digits".
+"""
+

loops.py

@@ -0,0 +1,40 @@
+# 2 loops 
+
+# for loop:
+
+"""
+Syntax..
+-> "range" : starts with 0.
+-> The space after the space is called as identiation, python generally identifies the block of code with the help of indentation, 
+indentation is generally 4 spaces / 1 tab space..
+
+
+for <variable> in range(<enter the range>):
+    statements you want to execute
+
+for <varaible> in <list name>:
+    print(<variable>) 
+To print the list / or any iterator items
+
+"""
+
+# 1. for with range...
+for i in range(3):
+    print("Hello... with range")
+    # prints Hello 3 times..
+
+# 2.for with list
+
+l1=[1,2,3,78,98,56,52]
+for i in l1:
+    print("list items",i)
+    # prints list items one by one....
+
+for i in "ABC":
+    print(i)
+
+# while loop:
+i=0
+while i<=5:
+    print("hello.. with while")
+    i+=1

saving_input_into_list.py

@@ -0,0 +1,13 @@
+ran= int(input("Enter the range of elements you want to store / insert "))
+l1=[]
+for i in range(ran):
+    l1.append(input("Enter here  "))
+
+print(l1)
+
+
+"""
+program first asks the user how many values they want to enter. Then, using a loop, it lets the user enter that many values one by one.
+Each entered value is saved into a list called l1. Once all the values are entered, the program prints the complete list, showing 
+everything the user typed. It's a beginner-friendly way to learn how to collect multiple inputs and store them for later use.
+"""