sheet1 Cheat Sheet

A cheat sheet in English by Pop B

1,837 views 877 downloads 12 Feb 2016 History

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Function

print()	show information that you want on the screen
int()	change number to be number integer
float()	change number to be decimal
input()	gain information from user
str()	a list of number, letter and symbols
len()	the length of the string
#	comment, no effect

vocabulary

variable	hold a value and can be change
string	a list of character such as number, letter and symbols
Integer number	whole number/ counting number
float number	the number in decimal
syntax	grammar/structure of lanquage
modulo	find the remainder
boolean	true/false

Math

==	equal to
!=	no equal to
<	less than
>	more than
<=	less than or equal to
>=	more than or equal to
%	modulo, find the remainder

addition

string + string	combine togethe
string + number	CRASH!
number + number	additional (math)

multiplication and exponents

string * number	combine that string
string * string	CRASH!
number * number	multiply (math)
string ** string	CRASH!
number ** number	Exponent (math)
string ** number	CRASH!

naming convention

Rule for giving name

-lettter

-number

-underscore(_)

valid name

-mystr

-my3

-hello_there

invalid name

-3my="hi" --cannot start with number

-first name="hi"

-first-name

reverse word

While true:

word = input("please enter a word")

index = 0

reverse = ' '

while int(index) < len(word):

reverse = word[index] + (reverse)

index = int(index) + 1

print ("Reverse: ", reverse)

convert to binary

user_number = ' '

while user_number != ' 0 ' :
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)

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