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Cheatography

HacklnwMuids Cheat Sheet by

For computer class

Boolean

False or True
True
False and True
False
True and False
False
True and True
True
False or False
False

Binary


user_number = input("Enter number to convert to binary : ")

number = int(user_number)

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

print ("Binary string is",binary_string)

Radius pi

while True:
    user_radius = input("Please enter the radius of the circle")
    radius = float(user_radius)
    pi = 3.1415

    area = piradius*2

    print ("The area of the circle is", area)

Math

+
plus
-
minus
*
multiply
/
divide give decimal
==
equal to
!=
not equal to
<
less than
>
more than
<=
less than or equal to
>=
more than or equal to
%
to find remainder
**
power
//
divide give integer

==

myboolean = 2 == 3

if myboolean:
     print ("truth")
else:
     print ("lies")

0,01,0­12,­012­3,01234

mystring = ''"
count = 0
while count <= 4:
    mystring = mystring + str(count)
    print (mystring)
    count = count + 1

mystring = ""
for num in range(5):
    mystring = mystring + str(num)
    print (mystring)

1 * 1 = 1

def multiplicationTable(num):
    
    multi = 0
    while multi < 10:
        multi = multi + 1
        user_output = num*multi
        print ( num,"*",multi,"=",user_output)


user_num = int(input("Enter the number: "))
multiplicationTable(user_num)

Fibonacci

num1 = 0
num2 = 1
fibonacci = num1 + num2
output = "0,1"
while fibonacci < 50:
    output = output +","+ str(fibonacci)
    num1 = num2
    num2 = fibonacci
    fibonacci = num1 + num2
print (output)
 

Multip­lic­ation and Exponent

string * number
Repeat that string by number
string * string
CRASH!
number * number
Multiply (Math)
string ** string
CRASH!
number ** number
Exponent (Math)
string ** number
CRASH!
String * Number
num = 1
stri = str(num)

print (stri * 3)
______­___­_____
#After running program
111

Hex

user_number = input("Enter number to convert to hex : ")

number = int(user_number)

hex_string = ''
while (number > 0):
    remainder = number % 16
    if remainder == 10:
        remainder = 'A'
    elif remainder == 11:
        remainder = 'B'
    elif remainder == 12:
        remainder = 'C'
    elif remainder == 13:
        remainder = 'D'
    elif remainder == 14:
        remainder = 'E'
    elif remainder == 15:
        remainder = 'F'

    hex_string = str(remainder) + str(hex_string)
    number = number // 16
     
print ("Hex string is 0x",hex_string)

Math

print(2)#interger
print(2.5)#floationg point
print("this is a string")#string

myStr = "hello"

print (myStr)

print ("hello" , 1, 2)

print ("""
hello
yeah
.
.
.
.
""")

"""
This multi line comment #lol
"""

#variable name
#can have interger, lowercase/uppercase letters, underscores

#Mate operators
# + - / *
#exponents
#2 to the power of 3

print (2 2 2 )
print (2 ** 3)

#Modulo/Remainder
print (4%2) #remainder = 0
print (33%2) #remainder = 1

#convert to floating point
print (float(2))

#covert to a string
myint = 1
mystring = str(myint)
print (mystring * 3)

#true/false - Boolean

print (2 < 3)
 

Addition

string + string
Combin­ation of string
string + number
CRASH!
number + number
Add (Math)

Definition

def printDefinition(word):
    if word == "variable":
        print ("""
        A variable is the the thing that can be changed.
        """)
    elif word == "parameter":
        print ("""
        A parameter is the limiting factor
        """)
    elif word == "argument":
        print ("""
        An argument is the identifier that you give to function
        """)
    elif word == "string":
        print ("""
        A string is something that can be repeated by the number.
        """)
    elif word == "function call":
        print ("""
        A function call is the word you use to reuse the function.
        """)
    else:
        print ("unknown word")

while True:
    user_input = input("Please type the word :")
    printDefinition(user_input)

Reverse

word = input("Please put a word :")
reverse = ""
letternum = 0

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

print ("Reverse: ",reverse)

for num in word:
    reverse = num + reverse

print ("Reverse: ",reverse)

Guess

import random
chance = 3
score = 0

mylist = ['Hack', 'ToeyD.', 'Patter','Tim','Lily']
random_item = random.choice(mylist)
while chance > 0:

    print (mylist)
    
    print ("Chances Remaining =",chance)
    guess = input("Guess a word from the above :")
    
    if guess == random_item:
        score = score + 100
        print ("That's correct!","The score is :",score)
        random_item = random.choice(mylist)
    else:
        print ("Sorry, wrong choice!")
        chance = chance - 1
    if guess in mylist:
        print ("")
    else:
        print ("Sorry,that is not even in the list!")
    if chance == 0:
        print ("Game Over! The word was",random_item)
        print ("Final score: ",score)

Even,Odd number

even = 0
odd = 0
while True:
    user_num = int(input("Enter the number :"))
    if user_num >= 0:
        if user_num % 2 == 0:
            even = even + 1
        else:
            odd = odd + 1
    else:
        print ("Even number :", even)
        print ("Odd number :", odd)
        break

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