How do I get out of the while loop after getting a re input

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Python

total_calories = 0

class Dish(object):
    def __init__(self, name, ingredients, calories):
        self.name = name
        self.ingredients = ingredients
        self.calories = calories
    
    def getname(self):
        return self.name
    
    def getingredients(self):
        return self.ingredients
    
    def getcalories(self):
        return self.calories
    
class Pasta(Dish):
    def __init__(self):
        Dish.__init__(self, "Pasta", "Macroni, Chicken, Salt, Vinegar, Soy sauce, Chilli sauce", 131)
        
    def getinfo(self):
        print(self.name, "\nIngredients:", self.ingredients, "\nCalories:", self.calories, "\n")
        
class Pizza(Dish):
    def __init__(self):
        Dish.__init__(self, "Pizza", "Chicken, Dough, Tomato Sauce, Cheese, Vegetables", 266)
        
    def getinfo(self):
        Pasta.getinfo(self)
        
class Burger(Dish):
    def __init__(self):
        Dish.__init__(self, "Burger", "Bun, Beef, Cheese, Lettuce, Ketchup", 225)
        
    def getinfo(self):
        Pasta.getinfo(self)
        
        
class Shawarma(Dish):
    def __init__(self):
        Dish.__init__(self, "Shawarma", "Pitta Bread, Ground Meat, Ketchup, Mayonnaise, Spices", 300)
    def getinfo(self):
        Pasta.getinfo(self)
        
p = Pasta()
i = Pizza()
b = Burger()
s = Shawarma()

p.getinfo()
i.getinfo()
b.getinfo()
s.getinfo()

quantity = int(input("How much food would you like to oder:"))

for i in range(1, quantity):
    d = input("enter the dish you want to order:")
    
    while (d != "Pasta" or "pasta" or "Pizza" or "pizza" or "Burger" or "burger" or "Shawarma" or "shawarma"):
        print("Try again from the menu")
        d = input("enter the dish you want to order:")
        
    if (d == "Pasta" or "pasta"):
        total_calories = total_calories + 131
        
    elif (d == "Pizza" or "pizza"):
        total_calories = total_calories + 266
        
    elif (d == "Burger" or "burger"):
        total_calories = total_calories + 225
        
    else:
        total_calories = total_calories + 300
        
print("Calories Consumed:", total_calories)

What I have tried:

I can't get out of the while loop after getting a re-input from the user if he does not enter from the menu

Posted 7-Jun-21 5:05am

Zain Aamir 2021

Updated 7-Jun-21 5:26am

OriginalGriff

v2

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OriginalGriff · Accepted Answer · 2021-06-07T05:25:00

or doesn't work like that.
Try like this:

Python

d = input("enter the dish you want to order:")

while (d != "Pasta" and d != "pasta" 
   and d != "Pizza" and d != "pizza" 
   and d != "Burger" and d != "burger"
   and d != "Shawarma" and d!= "shawarma"):
    print("Try again from the menu")
    d = input("enter the dish you want to order:")

Richard MacCutchan · Accepted Answer · 2021-06-07T05:26:00

Python

while (d != "Pasta" or "pasta" or "Pizza" or "pizza" or "Burger" or "burger" or "Shawarma" or "shawarma"):

That statement will never fail because each expression after or is a non-zero value so will always be true. You must use complete expressions in every case. You also need to use and rather than or so all conditions are tested.

Python

while (d != "Pasta" and d != "pasta" and d != "Pizza" and d != "pizza" and d != "Burger" and d != "burger" and d != "Shawarma" and d != "shawarma"):

You may also like to use a counter so the user cannot enter thousands of invalid words.

[edit]
A better test would be to use the lower method so you only need four tests:

Python

while (d.lower() != "pasta" and d.lower() != "pizza" and d.lower() != "burger" and d.lower() != "shawarma"):

[/edit]

How do I get out of the while loop after getting a re input

2 solutions

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