AP CSA Unit 3: Boolean Expressions & Operators

Logical Operators

Logical Operators

Can be used to connect boolean expressions to make more complex expression. NOT ! AND && OR ||

Short Circuit Evaluation

When the result of a logical expression using && or || can be determined by evaluating only the first Boolean operand, the second is not evaluated.

Nested if Statements

The process of placing if statements within if statements.

Truth Tables

A truth table is a table used in logic for comparing Boolean expressions.

Aliases

Two object references are considered aliases when they both reference the same object.

Reference equality

Equality operator (==) compares the references (addresses in memory) of 2 objects

Logical equality

Compares the data of the objects instead of the value of the references. Uses the .equals() method.

Relational Operators

== , !=. <. > , <=, >= These allow for the comparison or primitive type values. The result of these expressions can be stored as a Boolean value.

If Statement

An if statement lets you ask a question to the program and only run code if the answer is true.

Control Structure

A control structure lets us change the flow of the code.

Conditional Statement

A statement that evaluates to true or false.

If Else Statement

Control structure that lets us run either one section of code or another depending on a test.

Control Structure

A control structure lets us change the flow of the code.

else statement

Executes code only if all conditions are false

Condition

A condition is code that you put inside an if statement or while-loop.

else if Statement

A statement that executes if the previous statements are false and this statement is true