opal cheat sheet Cheat Sheet by opalnatnicha

import random

inlist = [1, 2, 3, 4, 5]
random_int = random.choice(inlist)
print(inlist, random_int)

fplist = [1.1, 1.2, 1.3, 1.4, 5]
random_fp = random.choice(fplist)
print(fplist, random_fp)

strlist = ["tien", "love", "opal"]
random_str = random.choice(strlist)
print(strlist, random_str)

mylist = ["opal", 1, 1.2]
random_item = random.choice(mylist)
print(mylist, random_item)

myvar1 = 1
myvar2 = 2
myvar3 = 3
varlist = [myvar1, myvar2, myvar3]
random_var = random.choice(varlist)
print(varlist, random_var)

[1, 2, 3, 4, 5] 1
[1.1, 1.2, 1.3, 1.4, 5] 5
['tien', 'love', 'opal'] tien
['opal', 1, 1.2] 1.2
[1, 2, 3] 3

def isPalindrome(word):
    reverse = ""
    letter_num=0
    while letter_num<len(user_input):
        reverse = user_input[letter_num]+reverse
        letter_num = letter_num+1

    if reverse==word:
        return True
    else:
        return False
    
while True :

    user_input = input("Enter a word")

    if user_input == "quit":
        break
    

    isPal = isPalindrome(user_input)
    
    if isPal == True:
        print (user_input,'is parindorm')
    else:
        print (user_input,'is not parindorm')
        break

def maxlist(list):
    maxvalue = list[0]

    for item in list:
        if item > maxvalue:
            maxvalue = item

    return maxvalue
mylist = [1,2,3,4,55,66,777,0,1]
print(maxlist(mylist))

def myprint(text):
    print ("***" + str(text) + "***")

    return

myprint("opal")

hello it's bacon
***opal***

def myprintnew(text, decoration):
    print (decoration + str(text) + decoration)
    return
myprintnew("opal", "m")

hello it's bacon
***opal***
mopalm

def doubleit(number):
    return number * 2

print (doubleit(3))
print (doubleit(doubleit(4)))


hello it's bacon
***opal***
mopalm
6
16

Rule for giving name
-letter
-numbers
-underscore_

Valid name
- _myStr
- my3
- Hello_there

Invalid name
- 3my="hi" -- cannot start with number
- first name = "hi"
- first-name
- first+name

mystr = "Hello"

letter_num = 0

while letter_num < len(mystr):
         print (mystr[letter_num])
         letter_num = letter_num + 1


H
e
l
l
o

mystring = "hello"
print (mystring)
firstname = input( "what is your first name?")
lastname = input( "what is your last name?")
fullname = firstname + " " + lastname
print (fullname)

letternumber = int(input( " what is letter number? " ))
if letternumber >len(fullname):
    print ( " invalid letter number, try again! " )
else:
    letter = ( fullname[letternumber] )
    print (letter)

    numberletter = int(input( "how many times to print letter " ))

    if numberletter >100:
       print ( " too many letters to print! " )
    else:
        print (letter * numberletter )

print("'-'-'-'-'-'-'-'-'-'-'-'")
print("Guessing Game")
print("'-'-'-'-'-'-'-'-'-'-'-'")
      

import random

mylist = ['opal', 'game', 'pin', 'timmy', 'tupkung']

random_item = random.choice(mylist)


print("Words :",mylist)
chance = 5
score = 0

while chance > 0:
    user_guess = input("Guess a word: ")
    if user_guess == random_item:
        print("That's correct!")
        score = score+100
        print ("score: ",score)
        print ("chance remaining: ",chance)
        random_item = random.choice(mylist)       
    else: 
        chance = chance-1
        if user_guess in mylist:
               print("Sorry, wrong choice!")
        else:
               print("Sorry, That is not even in the list")
        print("chance: ",chance)
print ("Game over! The word was", random_item)
print ("Final score is :", score)

reverse = ""
letter_num = 0
while True==True : #loop will go forever
    user_input = input('type in a string: ')

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

    if user_input == reverse:
        print("user_input is the parindorm")
    else:
        print("user_input is not a parindorm")

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


print (max2(4,5))
print (max2(33,5))


def max3(num1,num2,num3):
    
    maxvalue = num1

    if num2 > maxvalue:
        maxvalue = num2
    if num3 > maxvalue:
        maxvalue = num3
    
    return maxvalue
print (max3(1,2,3))

mystr = "hellp THERE"

print (mystr.upper()) -all letters will become big HELP THREE
print (mystr.lower()) -all letters will become small help three
print (mystr.capitalize()) -First letter of first word will become big Help three
print (mystr.title())- first letter of each words will become big Help Three

user_number = ' '

while user_name != '  '     
user_number = input("Enter a number to convert to binary")
     number = int(user_number)
     binary_string = ' '

     while (number > 0)
          remainder = number%2
          binary_string = str(remainder)+binary_string
          number = number//2

print ("Binary string is", binary_string)

def areaofcircle(radius):
    if radius <= 0:
        return "Error: invalid raadius"

    pi = 3.1415
    area = pi (radius*2)
    return area

user_radius = float(input("Enter the radius: "))

print('The area of the circle is', areaofcircle(user_radius))

Enter the radius: 2
The area of the circle is 12.566

Enter the radius: 0
The area of the circle is Error: invalid raadius

def printdefinitions(word):
    if word == ("variable"):
        print ("""A variable is the value that can change""")
    elif word == ("function"):
        print ("""A function is the blog of code that can be reused""")
    elif word == ("parameter"):
        print ("""A parameter is something given to the function""")
    elif word == ("agrument"):
        print ("""An agrument is something given to the function""")
    elif word == ("string"):
        print ("""A string is a lsit of characters""")
    elif word == ("function call"):
        print ("""A function call makes your function run""")
    else:
        print ("Unknown word")
    return
while True: #keep the loop go forever
    user_input = input("Enter word: ")
    
    printdefinitions(user_input)

def areaofTriangle(b,h):
    return 0.5  b  h

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


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


def volumeofprism(b,h,l):
    volume = areaofTriangle(b,h) * l
    return(volume)

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

print('The volume of prism is', volumeofprism(user_base, user_height, user_length))