# lecture 5, 12.10.2022, repetition statements
print("Welcome!")

# NEW FILE

# for loop, numbers from 0 to 9
# 10 - 1 = 9
for x in range(10):
    print(f"Cycle: {x}")

# NEW FILE

# print years from 2015 to 2022
# remember, 2023 - 1 = 2022
for year in range(2015, 2023):
    print(year)

# NEW FILE

print("Welcome!")

# double the number on each cycle
# you can try is in Python Tutor too!
for cycle in range(10):
    number = cycle * 2
    print(number)

print("Thank you!")

# NEW FILE

# empty text variable for the loop to fill later
text = ""

# for-loop, add new years to the text variable
# one year at a time + one dash!
for year in range(2017, 2023):
    text = text + str(year) + "-"

# remove the last dash by using substrings
text = text[0:-1]
print(text)

# NEW FILE

print("Welcome!")

# for loop with an if-statement
# even and odd numbers
for x in range(10):
    if x % 2 == 0:
        print(x)
    else:
        print("Odd number...")

print("Thank you!")

# NEW FILE

counter = 1

# print the counter variable as long as it's less or equal to 10
while counter <= 10:
    print(counter)

    # if the counter variable is not increased by one after
    # each cycle, we get an infinite loop.
    # because counter will then remain at 1 forever, and
    # the while condition is never met
    counter = counter + 1

# NEW FILE

running = True

# while running variable == True
while running:
    print("Run the application!\n")

    # ask number from user, double it, and print it out
    number = input("Give number:\n")
    number = int(number)
    total = number * 2
    print(f"Doubled: {total}\n")

    # ask user if they want to continue the application
    answer = input("Continue? (y/n):\n")

    # if user answers "n", quit the application
    # (break out from the while-loop)
    if answer == "n":
        running = False

# all done, thank the user
print("Thank you for using our application!")

# NEW FILE

print("Welcome!")

# first loop, 3 cycles
for x in range(3):
    print(f"FIRST LOOP x = {x}")

    # for EACH CYCLE in the first for-loop
    # run this for-loop (5 numbers)
    for y in range(5):
        print(f"\tnested loop y = {y}")

# all done, thank the user
print("Thank you!")

# NEW FILE

# same logic applies to for examples orders and products
# each order has 5 products
print("Welcome!\n")

# first loop, 3 cycles
for order in range(3):
    print(f"LET'S PROCESS ORDER NUMBER: {order}")

    # for EACH CYCLE in the first for-loop
    # run this for-loop (5 numbers)
    for product in range(5):
        print(f"\tProcess product = {product} in this order")

print()
# all done, thank the user
print("Thank you!")

# NEW FILE

print("Let's begin!")

# five people in line waiting for their turn
for person in range(5):
    print(f"Person {person + 1} turn to speak!")

    # this person now says the numbers:
    for number in range(4):
        print(f"Person {person + 1} says number: {number + 1}!")

print()
print("Everyone has spoken!")

# NEW FILE

# for loop from 0 to 199
for x in range(200):

    # if x == 8, break out of the loop
    # and rest of loop code and cycles are
    # skipped!
    if x == 8:
        print("Found the data! Stop the loop.")
        break

    print(x)

# all done
print("All done!")

# NEW FILE

# loop, 0 to 19
for x in range(20):
    # if x == 8, skip the rest of the code in this
    # cycle, and go to the next cycle
    if x == 8:
        continue

    print(x)

print("All done!")

# NEW FILE

total = 0

# ask the user a number for 100 times
for x in range(100):
    number = int(input("Give a number:\n"))
    total = total + number

print()
print(total)

# NEW FILE

cycles = int(input("How many numbers?\n"))

total = 0

# ask the user as many numbers as is set in cycles-variable!
for x in range(cycles):
    number = int(input("Give a number:\n"))
    total = total + number

print(total)

# NEW FILE

# first numbers in Fibonacci sequence
# 0, 1, 1, 2, 3, 5, 8, 13, 21, 34
# logic = each number is the sum of two previous numbers
# ask the user which Fibonacci number they want to know
# for example if they input 6, the number should be 5
# 7 should be 8 and so on...

choice = input("Which Fibonacci number you want to know?\n")
choice = int(choice) - 2

# these variables keep track of current two numbers
# needed to calculate the next Fibonacci number
old_number = 0
new_number = 1

# the idea of this loop is to update
# the next two numbers that are summed together
# for the Fibonacci number
# for example:
# cycle 1: 0 + 1
# cycle 2: 1 + 1
# cycle 3: 1 + 2
# cycle 2: 2 + 3
# cycle 2: 3 + 5
for number in range(choice):
    result = old_number + new_number
    old_number = new_number
    new_number = result
    print(result)

print(f"Fibonacci number: {result}")

# NEW FILE

# COMPOUND INTEREST WITH LOOP

# let's compute how much money we save
# yearly interest 7%
# 10 years time
# 15000 € in the beginning

start_money = 15000
interest = 1.07

# helper variable
total = start_money

# yearly deposit of 2000€, added in the beginning of every year
yearly_money = 2000

# compute the interest for 10 years
for year in range(10):
    total = total + yearly_money
    total = total * interest
    print(total)


# how much money we actually earned
# total - original money we invested - the 10 year investments (2000€ per year)
new_money = total - start_money - (10 * yearly_money)

total = round(total, 2)
new_money = round(new_money, 2)

print()
print(f"Bank total in the end: {total} €")
print(f"New money earned: {new_money} €")

# NEW FILE

# COMPOUND INTEREST WITH LOOP

# let's compute how much money we save
# yearly interest 7%
# 10 years time
# 15000 € in the beginning

start_money = 15000
interest = 1.07

# helper variable
total = start_money

# yearly deposit of 2000€, added in the beginning of every year
yearly_money = 2000

# this is our goal in saving and investments
saving_target = 1000000
winnings = 0

# compute the interest for 10 years
for year in range(1, 31):
    total = total + yearly_money
    total = total * interest

    # calculate current winnings
    winnings = total - start_money - (year * yearly_money)
    print(winnings)

    # check our current winnings are over the target
    if winnings > saving_target:
        print(f"The target was met at year {year}!")
        break


# just in case we didn't manage to get to the target
# inform the user
if winnings < saving_target:
    print("The saving target is not possible with the given years.")