def ageCheck():
    birthYear = int(input('Your birth year: '))
    age = 2020 - birthYear
    print("You are %d years old" % (age))

# This program takes the user's birth year as an integral input and stores it as a variable.
# It then subtracts birthYear from 2020 and then prints it out in a statement.

def downwardCount():
    n = 5
    while True:
        n = n - 10
        print(n)
        if keyboard.is_pressed('e'):
            break
            print("Please pick a new program.")

# This program assigns the value 5 to n and runs an infinite loop subtracting 10 from n.
# It then stops the program when the letter "e" is inputted and tells the user to choose a new program.

def deskLength():
    while True:
        try:
            lengthInInches = int(input("Length of the desk in inches: "))
            lengthInCM = lengthInInches * 2.54
            print("The desk is %d centimetres long" % (lengthInCM))
            print("Please pick a new program.")
        except ValueError:
            print("Please print an integer.")
            continue
        else:
            return(lengthInInches)

# This program tries to take an integral input as to how long the desk is in inches.
# It then converts the inches to centimeters and outputs its length in a statement.
# If a number is not inputted, it catches the ValueError and re-prompts the user to input an integer.

def goodDay():
    x = 1

    while x <= 6:
        print("Have a good day")
        x += 1

# This program assigns "x" the value of 1 then runs a loop saying to print the statement until x = 6.
# After each output, it adds 1 to x.

def ticketPrice():
    while True:
        try:
            age = int(input("Your age: "))

            if age < 14:
                print("You are a child and must pay $5.00.")

            elif age > 65:
                print("You are a senior and must pay $7.00.")

            else:
                print("You are an adult and must pay $9.00.")

        except ValueError:
                print("Please enter a numerical age.")
                continue
        else:
            return(age)

# This program tries to take age as an input and stores it in a variable.
# If the program catches a ValueError and the input isn't an integer, then it reprompts the user.
# Depending on the value of the age inputted, it outputs a statement saying how expensive the user's movie ticket would be.

def passOrFail():
    while True:
        try:
            grade = int(input("Your class mark: "))

            if grade >= 50:
                print("You passed the course")

            if grade < 50:
                print("You failed the course")
        except ValueError:
            print("Please enter a numerical grade.")
            continue
        else:
            return(grade)

# This program attempts the user's school grade an input and stores it as the variable "grade"
# If the input is not a number and the program catches a ValueError, then it re-prompts the user until a proper input is given.

def speedCheck():
    while True:
        try:
            hours = get_numeric_input("Number of hours in trip")
            minutes = get_numeric_input("Number of additional minutes in trip")
            distance = get_numeric_input("Distance of trip in kilometers")

            speed = distance / (hours * 60 + minutes) * 60

            print("You are driving at %d km/h." % (speed))

# This program takes 3 variables as inputs: hours, minutes and distance.
# It then calculated the speed using the formula "speed = distance / time"
# The hours are converted to minutes then added to the minutes, then converted to km/h at the end by multiplying by 60.
# it uses the "get_numeric_input" function instead of "try" and "except"
# This is because "try" and "except" resets all the variables and forces the user to re-input everything.

def get_numeric_input(message):
    while True:
        try:
            return int(input(message))
        except ValueError:
            print("Please enter a  whole number")

# This is the companion function to speedCheck()
# It is used instead of "try" and "except" individually because that is excess code and forces the user to re-input everything
# creating a function instead of adjusting each variable individually is much easier and more efficient

def wordCounter():
    wordList = []

    word = str(input("Enter your word: "))

    while word != "exit":
        wordList.append(word)
        word = str(input("Enter your word: "))
        wordCount = len(wordList)

    print("You inputted %d words" % (wordCount))

# This function is similar to positiveIntegers() in that it stores inputs into a list.
# It stores words in the list wordList
# The function keeps prompting the user for words until the word "exit" is entered
# It then tells the user how many words were entered and stops the program

def integerSizing():

    positiveIntegers = []

    while True:
        try:
            while len(positiveIntegers) < 10:
                integer = int(input("Enter Positive Integer: "))
                if integer < 1:
                    print("Integer must be positive")
                    continue

                positiveIntegers.append(integer)
                positiveIntegers.sort()
                largest = positiveIntegers[-1]

            print("The largest number is %d" % largest)
            print("Please choose a new program")

        except ValueError:
            print("Please enter a positive integer.")
            continue
        else:
            return

# This program takes positive integers as an input and stores them in the list, positiveIntegers.
# If a positive integer is not inputted, then the user is re-prompted to enter one.
# the "while" loop runs until positiveIntegers has 10 values in it
# It sorts the inputted values and picks out