earn Cheat Sheet

user_number = input("Please enter a number: ")

number = int(user_number)

countdown_string = ""

while number > 0:
    countdown_string = countdown_string + " " + str(number)
    number = number-1 

print (countdown_string)

word = input("Type in a word: ")
reverse = ""
for letter in word:
     reverse in word:
print ("Reverse: ", reverse)

def areaOfCircle(r):
    if r <= 0:
        return "Error: invalid radius"
    pi = 3.1415
    area = pi * r **2

    return area
user_radius = float(input("Enter the radius: "))
print('The area of the circle is', areaOfCircle(user_radius))

reverse = ""
letter_num = 0

word = input('type in a word: ')

while letter_num < len(word):
    reverse = word[letter_num] + reverse
    letter_num = letter_num + 1
if reverse == word:
    print ('it is palindrome')
else:
    print ('it is not palindrome')

def max2(num1, num2):
    maxvalue = num1
    if num2 > maxvalue:
        maxvalue = num2
    return maxvalue

print(max2(8,99))
print(max2(5,6))

def max3(num1, num2, num3):
    maxvalue = num1
    if num2 > maxvalue:
        maxvalue = num2
    if num3 > maxvalue:
        maxvalue = num3
    return maxvalue

print(max3(1,2,3))
print(max3(4,5,6))

def maxlist(list):
    maxvalue = mylist[0]
    for item in list:
        if item > maxvalue:
            maxvalue = item
    return maxvalue

mylist = [1,5,9,10,13]
print(maxlist(mylist))

#for loop solution
mylist = [1,2,3,4,5]
for num in mylist:
    print(num)
#while loop solution
mylist = [1,2,3,4,5]
num = 0
while num < len(mylist):
    print(mylist[num])
    num = num + 1

def printDefinitions(word):
    if word == "variable":
        print ("""A variable is something in the memory that we can change""")

    elif word == "function":
        print ("""A function is to define the box of code""")

    elif word == "parameter":
        print ("""A parameter is value you give to the function""")

    elif word == "argumant":
        print ("""A argument is set of something that give to the function""")

    elif word == "function":
        print ("""A  function call is when you call the function and it will run""")

    elif word == "string":
        print ("""A string is something you want to put""")

    else:
        print ("unknown word")

    return

while True:
    user_input = input("Enter words: ")
    printDefinitions(user_input)

user_input = input("Enter a number: ")
user_input = float(user_input)
print(user_input / 2)

def multiplicationTable():
    user_input = input("Enter a number: ")
    num = int(user_input)
    count = 1
    while count <= 10:
        print(num, "*", count, "=", num*count)
        count = count + 1

0,1,1,2,3,5,8,13,...(เค้าให้เลขมา)
num1 = 0
num2 = 1
fibonacci = num1 + num2
myoutput = "0,1"
while fibonacci: < 50:
    myoutput = myoutput + "," + str(fibonacci)
    num1 = num2
    num2 = fibonacci:
    fibonacci: = num1 + num2
print(myoutput)

print (True)
print (2<3)
print (2! = 2)

import random

intlist = [10,20,30,40,50]
random_int = random.choice(intlist)
print = (random_int)

fplist = [1.1,2.2,3.3,4.4,5.5]
random_fp = random.choice(fplist)
print = (random_fp)

strlist = ['earn','pim','milly']
random_str = random.choice(strlist)
print = (random_str)

mylist = ['earn',10,1.1]
random_mylist = random.choice(mylist)
print = (random_mylist)

myvar1 = 1
myvar2 = 2
myvar3 = 3
random_var = [myvar1, myvar2, myvar3]
print = (random_var)

def areaOfTriangle(b, h):
    area = 1/2 * b * h

    return area

user_base = float(input('Enter the base of the triangle: '))
user_height = float(input('Enter the height of the triangle: '))

print ('The area of the triangle is', areaOfTriangle(user_base, user_height))

def volumeOfPrism(b, h, l):
    volume = areaOfTriangle(b, h) * l
    return volume

user_lenght = float(input('Enter the lenght of the prism: '))

print ('The volume of the prism is', volumeOfPrism(user_base, user_height, user_lenght))

reverse = ""
letter_num = 0

word = input('type in a word: ')

while letter_num < len(word):
reverse = word[letter_num] + reverse
letter_num = letter_num + 1

if reverse == word:
print ("it is palindrome")
else:
print ("it is not palindrome")

num = 0
while num < 100:
    num = num + 2
    print (num)

mylist = ['cokezero', 'bacon', 'pepsi']
for item in mylist:
    print(item)