Python Cheat Sheet

def areaofcircle (radius): #define function named areaofcircle, parameter radius
    if radius <= 0:
        return "Error: Invalid radius"
    pi = 3.1415
    area = 3.1415 \* radius\*\*2
    return area # return the area of the circle

userradius = float(input("Enter the radius:"))
print ("The area of the circle is", areaofcircle(userradius))
    

def bacon() :
    print ("hello it's bacon")
    return
   
bacon()

string = input("Please type the string:")
string = str(string)
letter_num = 0
reverse = ""
while letter_num < len(string) :
     reverse = string[letter_num]+ reverse
     letter_num = letter_num + 1
if string == reverse :
    print ("This string is palindrome")
else :
    print ("This string is not palindrome")

#write a function that returns the largest of two values
#name: max2
#arguments: num1, num2
#return: the largest value


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

user_num1 = int(input("Enter the first number:"))
user_num2 = int(input("Enter the second number:"))
print ("The largest value is:",max2(user_num1, user_num2))

#write a function that returns the largest number of three value
#name: max3
#arguments: num1, num2, num3
#return: the largest value

def max3 (num1,num2,num3):
    maxvalue = num1
    if num2 > maxvalue:
        maxvalue = num2
    if num3 > maxvalue:
        maxvalue = num3
    return maxvalue
user_num1 = int(input("Enter the first number:"))
user_num2 = int(input("Enter the second number:"))
user_num3 = int(input("Enter the third number:"))
print ("The largest value is:",max3(user_num1, user_num2, user_num3))

mylist = [1,2,3,4,5]

for number in mylist :
     print (number)

number = -100
while number < -1 :
    print (number)
    number = number + 2

mystr = "­­He­l­l­o"

letter_num = 0

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

import random

intlist = [1,2,3]
random_int = random.choice(intlist)
print (intlist,random_int)

fplist = [1.02,3.02,5.36]
random_fp = random.choice(fplist)
print (fplist, random_fp)

strlist = ['mind','mom','hall']
random_str = random.choice(strlist)
print (strlist, random_str)

mylist = [1,2.35,'tiger']
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)

def printDefinition(word):
    #word = user_input
    if word=="variable":
        print ("""
        A variable is the value that can change. You can refered it by make the name of the variable
        """)
    elif word=="function":#function
        print ("""
        A function define the block of code that can be reuse
        """)
    elif word=="parameter":#parameter
        print("""
        A parameter is the thing that you give to the function in Pyton
        """)
    elif word=="argument":#argument
        print("""
        An argument is the thing that you give to the function
        """)
    elif word=="function call":#function call
        print("""
        A function call is command that call code in the function to run or execute
        """)
    elif word=="string":#string
        print("""
        A string is the list of letter, number, space or everything
        """)
    else :
        print ("Unknow word")
    return
while True:
    user_input = input("Enter word:")
    printDefinition(user_input)

#write a function that returns the largest number in a list
#name: maxlist
#argument: numlist
#return the largest value in a list

def maxlist(numlist):
    maxvalue = numlist[0]
    for item in numlist :
       if item >= maxvalue:
           maxvalue = item
    return maxvalue
numlist = [1,2,35,2654,232,5,2,5]
print(maxlist(numlist))

myword = "hellothere"
print (myword[4])

mystring = ""
count = 0
while count < 5 :
    mystring = mystring + str(count)
    print (mystring)
    count = count + 1

word = input ("Please type the world : ")
letter_num = 0
reverse = ""
while letter_num < len(word) :
     reverse = word[letter_num]+ reverse
     letter_num = letter_num + 1
print ("reverse :", reverse)

OR

word = input("Please type the word :")
reverse = ""
for letter in word : 
     reverse = letter + reverse
print ("reverse :", reverse)

number = input ("What you want to convert to binary :")
number = int(number)
binary = ""
while (number > 0):
    remainder = number%2
    binary = str(remainder)+ binary
    number = number//2
print (binary)

number = input ("What you want to countdown :")
number = int(number)
countdown = ""
while number > 0:
    countdown = countdown + str(number) + " "
    number = number - 1
print(countdown)

user_r­­adius = input(­­"What is a radius of a circle­­?") # to get number from user

radius = float(­­us­e­r­_r­­adius) #Convert the given radius to a floating point

pi = float(­­3.1­415) #determine the value of variable called pi

area = pi(ra­­diu­­s^2^) #Calculate the area of the circle using exponents

print ("The area of the circle is", area) #Show the area of the circle to the user

chance = 5
score = 0


mylist = ['coke','bacon', 'chicken', 'pocky', 'pepsi', 'pizza']

import random
random_item = random.choice(mylist)




while chance > 0:
    
    print ("-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-")
    print ("Guessing Game")
    print ("-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-")

    
    print ("Words:", mylist)
    



    user_guese = input("Guese the word: ")
    if user_guese == random_item:
        score = score+100
        print ("That's correct! Score:", score)
        random_item = random.choice(mylist)
    else:
        chance = chance-1
        if user_guese in mylist:
            print ("Sorry, wrong choice!")
            print ("Chances Remaining:", chance)
        else:
            print ("Sorry, that is not ever in the list")
            print ("Chances Remaining:", chance)

print ("Game Over! The word was", random_item)
print ("Final Score:", score)
    

# write a function that computers the area of a triangle

#name: areaofTriangle
#parameters : b, h
#return : area

def areaofTriangle(b,h):
    area = 0.5*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))

# write a function that computers the area of a triangle

#name: areaofTriangle
#parameters : b, h
#return : area

def areaofTriangle(b,h):
    area = 0.5*b*h
    return area

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


#write a function that computes the volume of a prism
#name: volumeofPrism
#parameters: b, h, l
#return: volume

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))

wlist = [2,4,5,6,7,8]

letternum = 0
while letternum < len(wlist) :
    print (wlist[letternum])
    letternum = letternum + 1