# Have you wondered what would happen if you had an infinite loop? 
# It is important to break away from an infinite loop else, the computer keep processing without any end
# Let us take a look at some programs that help break from a loop

'''Task 1: Whats the price '''
print("**** Task 1: ****")
print()
# Write a program that takes the price of goods sold as inputs from the user.
# To stop entering or when the user is done, he or she news to press 0.
# Once the user is done,the program must print
# - Total cost  of the goods 
# - Total number of goods.
x=1
items = 0
cost = 0
while x != 0:
    x=int(input("Tell me the price of one of your goods, this will stop coming when you enter 0\n"))
    if x != 0:
        items+=1
    cost +=x
print(f"You have bought {items} items at a price of ${cost} ")


'''Task 2: Lemonade and Glasses '''
print("**** Task 2: ****")
print()
# Your friend Sam has a jar with 5 cups of fresh lemonade.  
# Jack has some glasses which hold 1.5 cups each of liquid.  
# How many glasses of lemonade can Jack serve?
from decimal import Decimal
g = Decimal(5)/Decimal(1.5)
print(g)
x=0 
counter = 0
while x <= 5:
    x += 1.5
    counter += 1
print(counter)



'''Task 3: Population Calculator '''
print("**** Task 3: ****")
print()
# Sam is thrilled how he is able to solve problems
# He now wants to solve a population projection problem
# Can you solve it for him?
# He wants to know how long will it take to reach a certain target population (in years), given a 
# - starting population =10000000
# - birthrate=0.015
# - deathrate=0.023
# - Reduction can be taken as 0.1.
# Hint1: Target population can be calculated as population * reduction
# Hint2: Change in population can be calculated using the formula (current_pop * birthrate) - (current_pop * deathrate)
starting_population = 10000000 
birthrate = 0.015
deathrate = 0.023
current_pop = starting_population
years = 0
print(f"The starting population is {starting_population:,}.")
target_input = input("What is your target population? ")
target_population = int(target_input)
if target_population >= starting_population:
    print("The population is already at or below that target!")
else:
    while current_pop > target_population:
        change = (current_pop * birthrate) - (current_pop * deathrate)
        current_pop += change
        years += 1

    print(f"\nResults:")
    print(f"It will take {years} years to reach a population of {int(current_pop):,}.")
'''Great! You are exceptionally good at coming out with programming solutions. Way to go!!'''