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Addition Cheat Sheet by

Addition

string + string
combine together
string + number
crash
number + number
math - addition

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

Functions

print()
displays inform­ation on the screen
input()
receives inform­ation from the user
int()
converts a value to an integer

Math Operations

==
equal to
9 == 9
!=
not equal to
55 != 2
+
addition
9 + 3 = 14
-
minus
5 - 1= 4
*
mutiply
5 * 5 = 25
/
divide
4 / 2 = 2
%
remainder
3 % 2 = 1
**
power
2 ** 2 = 4
<
less than
1 < 2
>
more than
2 > 1
<=
less than equal to
2 =< 3
>=
more than equal to
3 => 2
//
divide by (no decimal point)
3/300 = 100
 

Vocabulary

variable
holds a value & can be changed
string
a list of characters such as numbers, letters, symbols.

Addition

string + string = Combine together
string + number = CRASH!
number + number = Addition (Math)

code

print (name.u­pp­er())
print (name.l­ow­er())
print (name.c­ap­ita­lize())
print (name.t­it­le())

Convert integer to binary

integer = input(­"­Enter a number­:")
integer = int(in­teger)
remainder = integer
binary = "­"
while integer != 0 :
remainder = integer % 2
integer = int(in­teger / 2)
remain­derstr = str(re­mai­nder)

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)
 

Multip­lic­ation & Exponents

string * number
combine that string multiple times
string * string
crash
number * number
math - multiply
string ** string
crash
number ** number
math- exponents
string ** number
crash

naming convention

Rules for giving names
- letters
- numbers (Can't be the first letter)
- underscore _

Valid
- _mystr
- my3
- Hello_­there

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

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