Expressions Worksheet

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Problem 1

The program below should result in a printed output of hello, world! – be careful, the correct output should have a trailing space!

print("hello,")
print("world! ")

hello, world! 

Problem 2

The program below should print:

12
21

Note that it includes several lines at the end that can’t be changed: modify the beginning of the program so that it results in the desired output.

x = (4 * 2) + 1
y = 4 * (2 + 2

print(y)
print(x + y)

12
21

Problem 3

The program below should print:

1
6

Note that it includes several lines at the end that can’t be changed: modify the beginning of the program so that it results in the desired output.

x = 2
y = x - 2
# hint: add a print statement

y = 2 + x
print(x + y)

1
6

Problem 4

The program below should print:

9
4

x = 6
y = 0

print(x * (2 + y))
y = x // 2
print(y)

9
4

Problem 5

x = "a space at the end"
y = "makes a difference"

print(x + y + z)

a space at the end
makes a difference 

Problem 6

The print statements in this program use the end = keyword argument to change what happens after the printed output:

• Normally, printing goes onto the next line
• Calling print with the end = changes this
• Experiment and figure it out!

x = "spacing"
y = "matters!"

print(x * 5, end = " ")
print(y)

spacing      matters!

Problem 7

Remember how the + operator behaves differently depending on what it operates on! This should print 5.0.

x = 3

print(x + 2)

5.0

Problem 8

Remember how the + operator behaves differently depending on what it operates on!

The desired printed output is:

is three the same as 3?

three = 3

print("is three the same as " + three + "?")

is three the same as 3?

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