Unit 5: JavaScript and Graphics 5.1-5.8
Presentation
•
Computers
•
8th - 9th Grade
•
Medium
Mattea Barnes
Used 3+ times
FREE Resource
20 Slides • 21 Questions
1
Unit 5: JavaScript & Control Structures
5.1-5.8
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5.1 Booleans
Booleans refer to only two values and are used to test whether a specific condition is...
3
Multiple Select
A boolean is a ____ or ____ value.
true
false
yes
no
4
Question:
Describe how you would create a boolean variable that stores whether it is raining or not. What name would you give it? What value would you assign to it if it is raining?
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Open Ended
Describe how you would create a boolean variable that stores whether it is raining or not. What name would you give it? What value would you assign to it if it is raining?
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Poll
How confident are you in your understanding of booleans?
Super Confident
Somewhat Confident
No Confidence
7
5.2 Logical Operators
Logical operators allow you to connect or modify boolean expressions. There are three logical operators...
8
Fill in the Blanks
Type answer...
9
Fill in the Blanks
Type answer...
10
Fill in the Blanks
Type answer...
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Review Questions
Answer the following questions about logical operators.
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Multiple Choice
If the variable a is true, what is the value of !a?
True
False
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Why is the answer false?
Let's discuss.
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var a = true;
So !a is false.
a is now false because the ! in front of a means not, making it not true.
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Multiple Choice
If the variable a is true and b is false, what is the value of a && b?
True
False
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Why is the answer false?
Let's discuss.
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If the variable a is true and b is false, what is the value of a && b?
The value is false because with the && logical operator, if both variables aren't true, then its value is false.
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Multiple Choice
If the variable a is true and b is false, what is the value of a || b?
True
False
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Why is the answer true?
Let's discuss.
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If the variable a is true and b is false, what is the value of a || b?
The answer is true because if at least one value is true, then it's true. If they both have false, then it would be false.
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Poll
How confident are you in your understanding of logical operators?
Super Confident
Somewhat Confident
With a little more practice, I'll have more confidence.
No Confidence
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5.3 Comparison Operators
Comparison operators let you compare two values.
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Multiple Select
Choose the correct comparison operators.
<=
>
=>
=
!=
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Multiple Choice
12 >= 12
True
False
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Multiple Choice
15 < 15
True
False
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Multiple Choice
1 < 33
True
False
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Multiple Choice
5 != 3
True
False
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Poll
How confident are you in your understanding of comparison operators?
Super Confident
Somewhat Confident
With a little more practice, I'll have more confidence.
No Confidence
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5.4 If Statements
If statements allow you to make decisions and execute specific code depending on the validity of a condition.
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Fill in the Blanks
Type answer...
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If Statements... let's discuss.
What are they?
Why are they useful?
How do you use them?
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What is something you only do if you are wearing a helmet? What is something you only do if you are outdoors? Create propositional statements: “If __, then __”
If I'm wearing a helmet, then I am biking.
If I'm outdoors, then I am going on a run.
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So what boolean value would hasHelmet be assigned if I wanted to ride a bike?
....
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var hasHelmet = true;
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Open Ended
Why do you think if statements are useful?
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Poll
How confident are you in your understanding of If Statements?
Super Confident
Somewhat Confident
With a little more practice, I'll have more confidence.
No Confidence
37
5.5-5.7: For Loops
For Loops allow us to do something for a set number of times.
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Multiple Choice
How would I correctly print out Hello three times using a for loop?
println("Hello");
println("Hello");
println("Hello");
for(i =0; i > 3; i++){
println("Hello");
}
for(i =0; i < 3; i++){
println("Hello");
}
for(i =0; i < 3; i--){
println("Hello");
}
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Multiple Choice
This code represents walking by taking several steps. Rewrite this using a for loop:
leftFoot();
rightFoot();
leftFoot();
rightFoot();
leftFoot();
rightFoot();
for(i =0; i <3; i++){
leftFoot();
rightFoot();
}
for(i = 1; i < 3; i++){
leftFoot();
rightFoot();
}
for(i =0; i <3; i++){
leftFoot();
rightFoot();
leftFoot();
rightFoot();
}
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If I wanted to print out the values 0 - 10, what would my for loop look like?
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WHICH ANSWER?
for(var i = 0; i < 11; i++)
for(var i = 0; i <= 10; i++)
Unit 5: JavaScript & Control Structures
5.1-5.8
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