ch8 ex3

rates = {
"apples" : 5.3,
"bananas" : 1.2,
"cereal" : 6.7,
"grapes" : 4.5,
"ice cream" : 11.4,
"jelly" : 2.3,
"kiwi" : 7.6,
"oranges" : 3.3
}
#using for loop
n = int(input("enter total itmes bought"))
quantities={}

for i in range(n):
    keys = input() # here i have taken keys as strings
    values = int(input()) # here i have taken values as integers
    quantities[keys] = values

#using while loop
abc = "yes"
while abc!="no":
    keys = input("enter product bought")
    values = int(input("quantity"))
    quantities[keys]=values
    abc = input("add more products? yes/no")

#using function
def grocerylist(keys, values):
    quantities[keys] = values

def compute_bill(a):
    total = 0
    for item, quantity in a.items():
        total += rates[item]*quantity
    return total
print(compute_bill(quantities))