ritttt Cheat Sheet

Print (2) – integer
Print (2.5) – floating point
Print (“Hello”) – string
Print (mystr) – variable
Print (mystr­,”H­i”,­2,1.0) -- commas

mystr = “Hi”
mystr ← name
“Hi” ← value can change

print (int(1.5)) → 1
print (int(“2”)) → 2
print (float(1)) → 1.0 anything to a float

Modulo­/Re­mainder %
print (4%2) → 0
print (30%7) → 2

mystr = "­Hel­lo"

letter_num = 0

while letter_num < len(my­str):
print (mystr­[le­tte­r_num])
letter_num = letter_num + 1
H
e
l
l
o

Rule for giving name 
- letter
- numbers
- underscore _

Valid name
- _myStr
- my3 
- Hello_­there

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

"­"­"
Python Intro Assignment #2
name
student number
"­"­"

#Ask the user for a radius of a circle
user_r­adius = input(­"What is a radius of a circle­?")

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

#Make a variable called pi
pi = float(­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)

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)

user_n­umber = input(­"What number do you want to count down? ")
number = int(us­er_­number)
countd­own­_string = ' '

while number > 0:
countd­own­_number = countd­own­_string + str(nu­mber) + " "
number = number - 1
#print­(nu­mber)

print (count­dow­n_s­tring)

fruits = [] #an empty list

for number in range(5):
user_fruit = input(­­"­P­lease enter a fruit")
fruits.ap­­pe­n­d­(u­­ser­­_f­ruit)

print ("Size of fruit list is", len(fr­­uits))

fruits.sort()

for fruit in fruits:
print ("Fruit: ", fruit)

import random

intlist = [9,8,7,6,5,4]
random_int = random.choice(intlist)
print (intlist, random_int)

fplist = [0.2,0.3,0.3]
random_fp = random.choice(fplist)
print (fplist, random_fp)

strlist = ["ABC", "BCA", "CAB"]
random_str = random.choice(strlist)
print (strlist, random_str)

mylist =[1,3,6,12,"ABC", "DEF", "HIJ"]
random_item =random.choice(mylist)
print (mylist, random_item)

myvar1 = 1
myvar2 = 2
myvay3 = 3
varlist =[myvar1, myvar2, myvar3]
random_var = random.choice(varlist)
print (varlist, random_var)