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

Nadia Najjar

Section 16.10 Review - Input

Practice using input() to get values from the user and understand that input() returns a string.
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Subsection 16.10.1 Quick Reference

input() gets information typed by the user. The value returned by input() is always a str. Use int() or float() if you want to convert the input to a number.
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name = input("Enter your name: ")
age = int(input("Enter your age: "))
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Subsection 16.10.2 Part A: Recognize

Checkpoint 16.10.1.

Answer the following questions based on this code snippet.
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name = input("Enter your name: ")
print(name)
  1. What does input() do?
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  2. What message is shown to the user?
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  3. What variable stores the user’s response?
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  4. What data type is the value returned by input()?
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Subsection 16.10.3 Part B: Predict What Happens

Checkpoint 16.10.2.

If the user types Raya, what is printed given the following code snippet?
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name = input("Enter your name: ")
print("Hello, " + name)
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Checkpoint 16.10.3.

If the user types 18, what is stored in age given the following code snippet?
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age = input("Enter your age: ")
print(age)
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Checkpoint 16.10.4.

If the user types 5, what is printed given the following code snippet?
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num = input("Enter a number: ")
print(num + num)
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Subsection 16.10.4 Part C: Explain

Checkpoint 16.10.5.

What is the difference between these two lines?
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value = input("Enter a number: ")

value = int(input("Enter a number: "))
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Subsection 16.10.5 Part D: Fix

Checkpoint 16.10.6.

Rewrite the code so it works correctly.
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Checkpoint 16.10.7.

Rewrite the code so it works correctly.
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Checkpoint 16.10.8.

Rewrite the code so it works correctly.
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Subsection 16.10.6 Part E: Create

Checkpoint 16.10.9.

Write code that asks the user for their name and prints a greeting. Then asks for their favorite number and prints it back. Finally, it asks the user for two whole numbers, and prints their sum.
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Subsection 16.10.7 Think About ...

Checkpoint 16.10.10.

Why is it sometimes necessary to use int() or float() with input()?
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