Question

Overview - Vending Machine

For this project, we will simulate a vending machine where, for simplicity, all of the items in the machine are the same price of $1.25

The vending machine can receive Nickels, Dimes, Quarters, and one dollar Bills.

The user can add money, ask for the product, ask for their money back, or walk away (exit).

The program will interact with the user and allow the following commands:

• N - adds nickel
• D - adds dime
• Q - adds quarter
• B - adds $1
• R - returns money
• P - dispenses product and returns change if the balance is enough to cover the cost
• X – exit

Since in theory the user can buy two products, dispensing the product doesn’t end the program, exiting ends the program.

Sample Run

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): g

Invalid Coin or Bill or Command

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Unable to dispense!

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): q

Item Cost: 1.25 Balance: 0.25

Enter Money(Q,D,N,B for Bill) or command (R, P, X): d

Item Cost: 1.25 Balance: 0.35

Enter Money(Q,D,N,B for Bill) or command (R, P, X): n

Item Cost: 1.25 Balance: 0.40

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Unable to dispense!

Item Cost: 1.25 Balance: 0.40

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 1.40

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Got Product with change: 0.15

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 1.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 2.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Got Product with change: 0.75

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 1.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): d

Item Cost: 1.25 Balance: 1.10

Enter Money(Q,D,N,B for Bill) or command (R, P, X): d

Item Cost: 1.25 Balance: 1.20

Enter Money(Q,D,N,B for Bill) or command (R, P, X): d

Item Cost: 1.25 Balance: 1.30

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Got Product with change: 0.05

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 1.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): d

Item Cost: 1.25 Balance: 1.10

Enter Money(Q,D,N,B for Bill) or command (R, P, X): d

Item Cost: 1.25 Balance: 1.20

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Unable to dispense!

Item Cost: 1.25 Balance: 1.20

Enter Money(Q,D,N,B for Bill) or command (R, P, X): n

Item Cost: 1.25 Balance: 1.25

Enter Money(Q,D,N,B for Bill) or command (R, P, X): p

Got Product with change: 0.00

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 1.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): b

Item Cost: 1.25 Balance: 2.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): r

Money Returned: 2.00

Item Cost: 1.25 Balance: 0.00

Enter Money(Q,D,N,B for Bill) or command (R, P, X): x

Bye Bye!

Press any key to continue . . .

Answer 1

balance = 0.00
  
while(True):
print("Item Cost: 1.25 Balance:{:,.2f}".format(balance))
key = input("Enter Money(Q,D,N,B for Bill) or command (R, P, X):").lower()
if(key == "x"):
print("Bye Bye!\nPress any key to continue . . .")
break
elif(key == "r"):
print("Money Returned:{:,.2f}".format(balance))
balance = 0.0
elif(key == "p"):
if(balance < 1.25):
print("Unable to dispense!")
else:
print("Got Product with change:{:,.2f}".format(round(balance - 1.25,2)))
balance = 0.0
elif(key == "q"):
balance += 0.25
elif(key == "d"):
balance += 0.1
elif(key == "n"):
balance += 0.05
elif(key == "b"):
balance += 1.0
else:
print("Invalid Coin or Bill or Command")
  
hope this is helpful, In info if x is pressed end the program ,but in sample output "press any key to continue.." ,there is little bit confusion, As of now it ends the program, for any modifications comment below