How to use While loop within an if statement on python?

Question

def change():
    if choice == 1:    #<--- issue here
        while True:
            amt = float(input("Enter amount of cash: $"))
            if amt >= a:
                print("Your change will be: ${:.2f}".format(amt - a))
                break
            else:
                print("Not enough, missing: ${:.2f}".format(a - amt))
                input("press enter to continue")


a = 15.60
b = 56.12
c = 89.53
d = 32.93
print("1. a: $15.60\t\t\t2. b: $56.12\n3. c: $89.53\t\t\t4. d: $32.93")
choice = input("Choose product (1-4): ")
change()

If I remove line 2, it would function properly but choice 1 would not be selected. I'd like it so this would run while choice 1 is selected. For some reason it's not allowing me to put an if statement before while loop. Is there a solution?

In Python 3.x, input() produces strings. No string is equal to 1. You either need to apply int() to the input, or compare it against "1". — jasonharper
– jasonharper, Commented Mar 3, 2019 at 5:19
The problem has nothing to do with the while statement. You would have the same problem with any statement there. — Barmar
– Barmar, Commented Mar 3, 2019 at 5:22

Hasitha Amarathunga · Accepted Answer · 2019-03-03 05:21:49Z

2

It's the problem in your input statement. In python 3 input get default as string.So you need convert it to integer as below.

choice = int(input("Choose product (1-4): "))

answered Mar 3, 2019 at 5:21

Hasitha Amarathunga

2,02114 silver badges19 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

FMS Labuduwa · Accepted Answer · 2019-03-14 07:09:58Z

1

Cast String to integer in python 3.x use int()

choice = int(input("Choose product (1-4): "))

answered Mar 14, 2019 at 7:09

FMS Labuduwa

214 bronze badges

Comments

Winner · Accepted Answer · 2019-03-03 05:22:50Z

0

Please try below code

def change():
print(choice, choice == 1, type(choice), int(choice) == 1)
if int(choice) == 1:    #<--- issue here
    while True:
        amt = float(input("Enter amount of cash: $"))
        if amt >= a:
            print("Your change will be: ${:.2f}".format(amt - a))
            break
        else:
            print("Not enough, missing: ${:.2f}".format(a - amt))
            input("press enter to continue")


a = 15.60
b = 56.12
c = 89.53
d = 32.93
print("1. a: $15.60\t\t\t2. b: $56.12\n3. c: $89.53\t\t\t4. d: $32.93")
choice = input("Choose product (1-4): ")
change()

answered Mar 3, 2019 at 5:22

Winner

451 gold badge4 silver badges16 bronze badges

Collectives™ on Stack Overflow

How to use While loop within an if statement on python?

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related