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Lesson 9

Conditionals

Foundations of AI Programming

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Warm Up

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If the description fits you, then stand up.
If not, then stay seated.

Do This:

Foundations of AI Programming Conditionals – Warm Up

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Let's Review: Algorithms

An algorithm is a set of instructions to accomplish a task. This usually includes:

Sequencing: steps in order
Selection: making decisions
Iteration: repeating steps

Foundations of AI Programming Conditionals – Warm Up

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Which component of an algorithm did you just experience when you either stood or stayed seated?

Discuss:

Foundations of AI Programming Conditionals – Warm Up

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Explain what a conditional statement does and when to use one in a program.
Write if statements in Python to control program flow.
Identify and fix common errors in if statements.

Lesson Objectives

By the end of this lesson, you will be able to . . .

Foundations of AI Programming Conditionals – Warm Up

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How can we use conditional statements to help a computer make decisions?

Question of the Day

Foundations of AI Programming Conditionals – Warm Up

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Activity

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	if isabel.can_move("south"):
	isabel.move()
	isabel.paint("blue")

	if isabel.can_move("south"):
	isabel.move()
	isabel.paint("blue")

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	if isabel.can_move("south"):
	isabel.move()
	isabel.paint("blue")

	if isabel.can_move("south"):
	isabel.move()
	isabel.paint("blue")

Foundations of AI Programming Conditionals – Activity

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You should have:

Foundations of AI Programming Unit Guide
pen or pencil

Unit Guide

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A conditional statement tells a computer to do something only if a certain condition is True.


	if painter.can_move("south"):
	painter.move()
	painter.paint("blue")

📝 Unit Guide

What is a Conditional Statement?

Foundations of AI Programming Conditionals – Activity

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	1	if isabel.can_move("south"):
	2	isabel.move()
	3	isabel.paint("blue")

📝 Unit Guide

Foundations of AI Programming Conditionals – Activity

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	1	if isabel.can_move("south"):
	2	isabel.move()
	3	isabel.paint("blue")

📝 Unit Guide

Foundations of AI Programming Conditionals – Activity

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	1	if isabel.can_move("south"):
	2	isabel.move()
	3	isabel.paint("blue")

📝 Unit Guide

Foundations of AI Programming Conditionals – Activity

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	1	if isabel.can_move("south"):
	2	isabel.move()
	3	isabel.paint("blue")

📝 Unit Guide

Foundations of AI Programming Conditionals – Activity

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	1	if isabel.can_move("south"):
	2	isabel.move()
	3	isabel.paint("blue")

📝 Unit Guide

Foundations of AI Programming Conditionals – Activity

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Why do you think conditionals are useful in programs? What kinds of decisions might a program need to make?

Discuss:

Foundations of AI Programming Conditionals – Activity

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Do This:

Exploring Conditionals

1

Lesson 9

Go to Lesson 9, Level 1.
Complete Levels 1 through 4 to explore how to use if statements.
Complete the Check Your Understanding on Level 5.

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What did you learn about if statements?

Discuss:

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What questions do you still have about if statements?

Discuss:

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What are the benefits of using if statements in our code?

Discuss:

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UMPIRE

Remember to use the UMPIRE strategy as you work on using conditionals within your programs.

U

M

P

I

R

E

Understand

Make a plan

Produce

Inspect

Refine

Explain

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Do This:

Decisions with the Painter

6

Lesson 9

Go to Lesson 9, Level 6.
Complete Levels 6 and 7 to solve problems using if statements.
Complete the Check Your Understanding on Levels 8 and 9.

A

B

C

D

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Wrap Up

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What a conditional statement does and when to use one in a program.
Writing if statements to control program flow.
Identify and fix common errors in if statements.

Today, you learned about . . .

Foundations of AI Programming Conditionals – Wrap Up

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How can we use conditional statements to help a computer make decisions?

Question of the Day

Foundations of AI Programming Conditionals – Wrap Up

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conditional statement: tells a computer to do something only if a certain condition is True

Key Vocabulary

Foundations of AI Programming Conditionals – Wrap Up