使用 while 循环时如何计算运行总数？

Question

I am having a hard time wrapping my head around this code (I am very new so please be gentle), in an attempt to write a program to track calories, I can't get the code:

caloriesPerMeal = int(input('Enter calories eaten per meal: '))

to add onto itself when it looks back and asks again if I want to enter another meal(as shown below):

keepGoing = input('Do you want to enter another meal? (Enter yes or no) ')

The entire code I have is:

keepGoing = 'yes'
totalCalories = 0
#Calories per Day
maxCaloriesPerDay = int(input('How many calories per day would you like to consume? '))
while keepGoing == 'yes':
    #Get number of calories per meal
    caloriesPerMeal = int(input('Enter calories eaten per meal: '))
    totalCalories += totalCalories + caloriesPerMeal
#See if user wants to input another meal
    keepGoing = input('Do you want to enter another meal? (Enter yes or no) ')
#Calculate calories under/over per day
if totalCalories >= maxCaloriesPerDay:
    print('You are', maxCaloriesPerDay - totalCalories, 'calories over your maximum calories per 
 day.')
elif totalCalories <= maxCaloriesPerDay:
     print('You are', maxCaloriesPerDay - totalCalories, 'calories under your maximum calories per 
day. ')

Answer 1

Try to do:

totalCalories = totalCalories + caloriesPerMeal

Or:

totalCalories += caloriesPerMeal

Because saying that totalCalories += totalCalories + caloriesPerMeal means that totalCalories = 2*totalCalories + caloriesPerMeal

Answer 2

keepGoing = 'yes'
totalCalories = 0
#Calories per Day
maxCaloriesPerDay = int(input('How many calories per day would you like to consume? '))
while keepGoing == 'yes':
    #Get number of calories per meal
    caloriesPerMeal = int(input('Enter calories eaten per meal: '))
    totalCalories += caloriesPerMeal
#See if user wants to input another meal
    keepGoing = input('Do you want to enter another meal? (Enter yes or no) ')
#Calculate calories under/over per day
if totalCalories >= maxCaloriesPerDay:
    print('You are', maxCaloriesPerDay - totalCalories, 'calories over your maximum calories per day.')
elif totalCalories <= maxCaloriesPerDay:
     print('You are', maxCaloriesPerDay - totalCalories, 'calories under your maximum calories per day. ')