code snippets used for the first class of CS 1.1

cs-1.1-01-snippets.py

# CS-1.1 Variables, Function, and Program Design

def addTen(x):
  plusTen = x + 10
  return plusTen
  
print(addTen(4))
# 14

print(addTen(10))
# 20

print(addTen(99))
# 109

########

days = 7

name = "Jane Doe"

fruits = ["apple", "banana", "pear"]

daysCopy = days

days == daysCopy # True

daysCopy = daysCopy + 1

days == daysCopy # False

fruitsCopy = fruits

fruits == fruitsCopy # True

fruits.pop() # removes the last item from the list

fruits == fruitsCopy # True

########

side_a = 15
side_b = 6

def calculateHypotenuse():
  side_c = sqrt(side_a * side_a + side_b * side_b)
  return side_c
  
w = 15
y = 6

def calculateHypotenuse():
  x = sqrt(w * w + y * y)
  return x
  
########

def printHelloWorld():
  str1 = "Hello"
  str2 = "World"
  print (str1 + ' ' + str2)
  
########

# int
numThree = 3

# float
shortPi = 3.14

sum = numThree + shortPi

print(sum) # 6.14000000000001


# int
numThree = 3

# string
shortPi = "3.14"

sum = numThree + shortPi

print(sum)
# Traceback (most recent call last):
#   File "<stdin>", line 1, in <module>
# TypeError: unsupported operand type(s) for +: 'int' and 'str'

########

threeInt = int("3") # threeInt will be  3

twoString = str(2) # twoString will be '2'

########

def refDemo(x):
  print("fun: x=",x)
  x = 42
  print("fun: x=",x)

x = 9
print("out: x=",x)
refDemo(x)
print("out: x=",x)