3 Key Takeaways

Question 1

returns True if operands’ values are equal, and False otherwise

Answer 1

==

Question 2

returns True if operands’ values are not equal, and False otherwise

Answer 2

!=

x != y # True
x != z # False

Question 3

True if the left operand’s value is greater than the right operand’s value, and False otherwise

Answer 3

>

x > y # False
y > z # True

Question 4

True if the left operand’s value is less than the right operand’s value, and False otherwise

Answer 4

<

x < y # True
y < z # False

Question 5

True if the left operand’s value is greater than or equal to the right operand’s value, and False otherwise

Answer 5

≥

x >= y # False
x >= z # True
y >= z # True

Question 6

True if the left operand’s value is less than or equal to the right operand’s value, and False otherwise

Answer 6

≤

x <= y # True
x <= z # True
y <= z # False

Question 7

the while loop executes a statement or a set of statements as long as a specified boolean condition is true, e.g.:

Answer 7

Example 1
while True:
print(“Stuck in an infinite loop.”)

Example 2
counter = 5
while counter > 2:
print(counter)
counter -= 1

Question 8

the for loop executes a set of statements many times; it’s used to iterate over a sequence (e.g., a list, a dictionary, a tuple, or a set - you will learn about them soon) or other objects that are iterable (e.g., strings). You can use the for loop to iterate over a sequence of numbers using the built-in range function. Look at the examples below:

Answer 8

Example 1
word = “Python”
for letter in word:
print(letter, end=”*”)

Example 2
for i in range(1, 10):
if i % 2 == 0:
print(i)

Question 9

You can use the break and continue statements to change the flow of a loop:

Answer 9

You use break to exit a loop, e.g.:

text = “OpenEDG Python Institute”
for letter in text:
if letter == “P”:
break
print(letter, end=””)

Question 10

You use continue to skip the current iteration, and continue with the next iteration, e.g.:

Answer 10

text = “pyxpyxpyx”
for letter in text:
if letter == “x”:
continue
print(letter, end=””)

Question 11

The while and for loops can also have an else clause in Python. The else clause executes after the loop finishes its execution as long as it has not been terminated by break, e.g.:

Answer 11

n = 0

while n != 3:
print(n)
n += 1
else:
print(n, “else”)

print()

for i in range(0, 3):
print(i)
else:
print(i, “else”)