U2L2- Operators and Expressions

• Ap csa
• 10th Grade

Remarks

Computer science impacts all aspects of our society in different ways.

In many cases, computer science has significantly changed how things are done and improved how people and businesses operate.

Share the example of computer science in business.

What is an arithmetic operator?

An arithmetic operator is a mathematical function that takes two operands and performs a calculation on them. They are used in common arithmetic and most computer languages contain a set of such operators that can be used within equations to perform a number of types of sequential

 calculation.

Where did you see operators before? How did you use them?

code.org

Please do level 1: Predict: Evaluating Expressions

What did you notice and wonder about the code in this program?

Define operand and expression.

explain how the value and type of the operand impact how the expression is evaluated.

demonstrate evaluating expressions and storing the value in a variable.

When would the mod operator be useful?

code.org

Please do level 2: Investigate: Exploring Expressions

What value is the result of evaluating this expression?
(5 * 3 - 4 / 2 ) % 3

1. 4
2. 3
3. 1
4. 2

What did you learn from each other?

How do these ideas and thoughts contribute to your identity as a software engineer?

How was this lesson

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good

hard

very hard

Vocab

expression: a combination of data and operators that evaluates to a single value

operand: the data that is operated on

compound expression: a combination of expressions

vocab

compound assignment operator: shortcut syntax (+=, -=, *=, /=,

 %=) to perform an operation (+, -, *, /, or %) on both operands and store the result into the variable on the left

ArithmeticException: an error caused by dividing by zero

truncate: to cut off data from the end

hw

level 3

unit guide

extra practice