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How To Think Like A Computer ITSC 1212 - Functions First Edition

Nadia Najjar

Section 16.9 Review - Output and print()

Practice using print() to display output, predict what programs print, and fix common output mistakes.
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Subsection 16.9.1 Quick Reference

print() displays output to the screen. It can print strings, numbers, variables, and expression results. When you print multiple values separated by commas, Python places a space between them in the output.
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Subsection 16.9.2 Part A: Recognize

Checkpoint 16.9.1.

Study the code below and answer the questions.
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name = "Raya"
print("Hello")
print(name)
  1. Which line prints a string literal?
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  2. Which line prints the value stored in a variable?
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  3. What is the purpose of print()?
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Subsection 16.9.3 Part B: Predict the Output

Checkpoint 16.9.2.

What is printed?
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print("CS Rocks")
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Checkpoint 16.9.3.

What is printed?
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name = "Jordan"
print("Hello, " + name + "!")
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Checkpoint 16.9.4.

What is printed?
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x = 4
y = 6
print(x + y)
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Checkpoint 16.9.5.

What is printed?
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print("Age:", 18)
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Subsection 16.9.4 Part C: Explain

Checkpoint 16.9.6.

Explain the difference between each pair.
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  1. print("5") and print(5)
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  2. print(name) and print("name")
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  3. print("Age:", 18) and print("Age: " + "18")
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Subsection 16.9.5 Part D: Fix

Checkpoint 16.9.7.

Rewrite the code so it works correctly.
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Checkpoint 16.9.8.

Rewrite the code so it works correctly.
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Checkpoint 16.9.9.

Rewrite the code so it prints the sentence “I am 18 years old.”
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Subsection 16.9.6 Part E: Create

Checkpoint 16.9.10.

Write code for each task.
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  1. Print the message “Welcome to CS1!”
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  2. Create a variable named score with the value 95 and print it.
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  3. Create a variable named name and print the greeting “Hello, <name>!”
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  4. Print the result of adding 8 and 2.
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Subsection 16.9.7 Reflection

Checkpoint 16.9.11.

When should you print a value directly, and when is it helpful to store the value in a variable first?
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