Math+  plus    minus  *  multiple  /  divide  %  remainder (4%2)> 0  **  exponent 2**3 > 2^3  ==  equal to  !=  not equal to  <  less than  >  more than  <=  less than or equal to  >=  more than or equal to 
Additionstring + string  combine together  string + number  crash  number + number  math  addition 
Functionsprint ()  displays information on the screen  input ()  receives information from the user  int ()  converts a value to an integer  str ()  string ("word") can be everything  float ()  change number to be decimal number  #  comment(one line)  " " " .......... " " "  comment(many lines)  import random + random.choice()  pick random item in the list 
Code2shoppinglist = ('tshirt', 'pants', 'socks')
for myvariable in shoppinglist:
print (myvariable)
print (shoppinglist(1))
for number in range(5):
print (number)

  Namefirstname = 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 )

VocabularyVariable  holds a value and can be changed  String  a list of characteristics such as numbers, letter, symbols  Syntax  Grammar  Modulo  Remainder %  Integer  Real number  Floating Point  Decimals  Boolean  True/False  == equal  != not equal  Syntax Error  make impossible to the parse 
Code1# Create a program that recieve a number from the user
# from that number on the same line
#recieve the number from the user as a string
user_number = input
#convert the user number to an integer
number = int(user_number)
#setup the countdown string
countdown_string = ""
while number > ():#the number is greater than 0)
remainder =
print (number)
#binary_string =
#output should look like this
# if the user enters 5:
# 5 4 3 2 1
print (countdown_string)

  Codemystring = "hello"  print (mystring)  firstname = input ("What is your firstname?")  lastname = input ("What is your lastname"?)  fullname = firstname + " " + lastname  print(fullname)  letternumber = int(input("What is letter number? " ) )  if lettername > len(fullname):  print ("invalid letter number, try again! " )  else:  letter = (fullname(letternumber) )  print (letter)  numberletter = int(input ( "How many times to print letter " ) ) 
Binaryuser_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) + str(binary_string)
number = number // 2
print ("Binary string is '', binary_string)

Area of Circlewhile 2==2:
#Ask the user for a radius of a circle
user_radius = input("What is the radius? ")
#Convert the given radius to a floating point
radius = float(user_radius)
#make a variable called pi
pi = 3.1415
#Calculate the area of the circle using exponents
area = pi radius * 2
#display the area of the circle to the user
print ("The area of the circle is",area)

Multiplication and Exponentsstring * number  combine that string  string * string  crash  number * number  math  multiply  string ** string  crash  number ** number  mathexponent  string ** number  crash 

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