Mod 3 Flashcards
What is the output:
2==2.0
True
What is the output:
x = 10
if x == 10:
print(x == 10)
if x > 5:
print(x > 5)
if x < 10:
print(x < 10)
else:
print("else")
True
True
else
What is the output:
x = “1”
if x == 1:
print("one")
elif x == "1":
if int(x) > 1:
print("two")
elif int(x) < 1:
print("three")
else:
print("four")
if int(x) == 1:
print("five")
else:
print("six")
four
five
x = 1 y = 1.0 z = "1"
if x == y:
print("one")
if y == int(z):
print("two")
elif x == y:
print("three")
else:
print("four")
one
two
What is the output:
for i in range (2, 8, 3):
print(i)
2
5
What does break do in a loop?
Exits the loop. The program begins to execute the nearest instruction after the loops body
What does continue do in a loop?
Skips the current iteration and continues with the next.
What is the output:
print("The break instruction:")
for i in range(1, 6):
if i == 3:
break
print("Inside the loop.", i)
print("Outside the loop.")The break instruction:
Inside the loop. 1
Inside the loop. 2
Outside the loop.
What is the output:
print("The continue instruction:")
for i in range(1, 6):
if i == 3:
continue
print("Inside the loop.", i)
print("Outside the loop.")The continue instruction: Inside the loop. 1 Inside the loop. 2 Inside the loop. 4 Inside the loop. 5 Outside the loop.
What is the output:
i = 1
while i < 5:
print(i)
i += 1
else:
print("else:", i)1 2 3 4 else: 5
What is the output:
for i in range(5):
print(i)
else:
print("else:", i)0 1 2 3 4 else: 4
What type of loop executes a statement or a set of statements as long as a specified boolean condition is true?
while
What type of loop executes a set of statements many times, used to iterate over a sequence (often used with the range function)
for
In while and for loops the else clause executes after the loop finishes its execution as long as it has not been terminated by ____.
break
Provide the range function syntax
range(start, stop, step)
What is the output of:
for i in range(5):
print(i, end=” “)
0 1 2 3 4
What is the output of:
for i in range(6, 1, -2):
print(i, end=” “)
6, 4, 2
What are the Bitwise Operations?
& conjunction (and)
| disjunction (or)
^ exclusive or
~ negation
Rules and summary of outputs of bitwise operators
& requires exactly two 1s to provide 1 as the result.
| requires at least one 1 to provide 1 as the result.
^ requires exactly one 1 to provide 1 as the result.
The arguments must be integers (no floats)
They deal with every bit seperately
What is the output of: var = 6 varRight = var >> 1 varLeft = var << 2 print(var, varLeft, varRight)
6 24 3
List facts (4):
- Ordered and mutable
- Collection of comma separated items (int, float, string, boolean, etc) in square brackets
- Index starts with 0
- Can be indexed, updated, nested, iterated, sorted, sliced and elements can be deleted
How to assign 111 to the 2nd element:
numbers = [10, 5, 7, 2, 1]
numbers[1] = 111
How to delete the 2nd element:
numbers = [10, 111, 7, 2, 1]
del numbers[1]
*note cannot access an element that doesnt exist, will cause a runtime error
What is the output of: numbers = [ 10, 7, 2, 1] print(numbers[-1]) print(numbers[-4]) print(numbers[-5])
1
10
IndexError: list index out of range
Function vs Method (3)
- Function owned by the whole code
- Method is owned by the data it works for
- Method can change the data of a selected entity
Use the append method to add a value to the below list and how to show the final list:
numbers = [ 10, 7, 2, 1]
numbers.append(111)
print(numbers)
output: [10, 7, 2, 1, 111]
Use the insert method to add a value to the below list in the 4th place position and how to show the final list:
numbers = [10, 7, 2, 1, 111]
numbers.insert(3, 54)
print(numbers)
output: [10, 7, 2, 54, 1, 111]
What is the output:
lst = [1, [2, 3], 4]
print(lst[1])
print(len(lst))
[2, 3]
3
What is the output:
lst = [1, 2, 3, 4, 5]
lst2 = []
add = 0
for number in lst:
add += number
lst2.append(add)
print(lst2)
[1, 3, 6, 10, 15]
What is the output: list1 = [1] list2 = list1 list1[0] = 2 print(list2)
[2]
What is the output: list1 = [1] list2 = list1[:] list1[0] = 2 print(list2)
[1]
What is the output: myList = [10, 8, 6, 4, 2] newList = myList[1:3] newList1 = myList[1:-1] newList2 = myList[-1:1] print(newList) print(newList1) print(newList2)
[8, 6]
[8, 6, 4]
[]
What is the output:
myList = [0, 3, 12, 8, 2]
print(5 in myList)
print(5 not in myList)
print(12 in myList)
False
True
True
What is the output: myList = [1, 2, 3, 4, 5] sliceOne = myList[2: ] sliceTwo = myList[ :2] sliceThree = myList[-2: ]
print(sliceOne)
print(sliceTwo)
print(sliceThree)
[3, 4, 5]
[1, 2]
[4, 5]
What is the output:
11 = [“A”, “B”, “C”]
12 = 11
13 = 12
del 11[0]
del 12[:]
print(13)
[]
What is the output:
z = [“A”, “B”, “C”]
x = z[:]
y = x[:]
del z[0]
del x[0]
print(y)
[‘A’, ‘B’, ‘C’]
Replace the ??? with in or not in so the appropriate value outputs:
myList = [1, 2, “in”, True, “ABC”]
print(1 ??? myList) # outputs True
print(“A” ??? myList) # outputs True
print(3 ??? myList) # outputs True
print(False ??? myList) # outputs False
in
not in
not in
in
What does “squares” represent and what is the output:
squares = [x ** 2 for x in range(10)]
print(squares)
List comprehension
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
How many columns and how many rows will be in the below array:
array = []
for i in range(5):
a = [“X” for i in range(4)]
array.append(a)
print(array)
There will be 4 columns and 5 rows. [['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X']]
How do you print this using List Comprehension?: [['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X'], ['X', 'X', 'X', 'X']]
array = []
array = [[‘X’ for i in range(4)] for j in range(5)]
print(array)
In a 3 x 3 box matrix (9 total boxes), what is the index of the bottommost center box?
[2][1]
How many columns, rows and tables is the below matrix made of?
b = [[[“Y” for r in range(20)] for f in range(15)] for t in range(3)]
20 columns
15 rows
3 tables
