3.1 Boolean Expressions

• Boolean expressions evaluate to either true or false. They use Boolean operators to compare values and conditions
• What are the three primary logical operators in Boolean expressions?

  AND, OR, NOT
• What does the NOT operator do to a Boolean expression?

  Reverses its truth value
• Order the steps for evaluating a Boolean expression with logical operators:

  1️⃣ Evaluate expressions within parentheses first

  2️⃣ Apply NOT operator

  3️⃣ Apply AND operator

  4️⃣ Apply OR operator
• What are Boolean expressions primarily used for in programming?

  Conditional statements and loops
• The NOT operator (`!`) returns the opposite truth value of the expression
• The AND operator returns true only if both expressions are true.


  True
• What does the NOT operator do in Boolean expressions?

  Reverses truth value
• The order of operations in Boolean expressions in Java follows a specific precedence
• The OR operator returns true if at least one of the expressions is true
• The expression `5 == 5` evaluates to true.


  True
• The AND operator returns true only if both expressions are true
• Truth tables summarize the behavior of logical operators
• The OR operator is denoted by the symbol ||
• Logical operators are used to combine or modify Boolean expressions
• Match the logical operator with its meaning:

  `&&` ↔️ AND

  `||` ↔️ OR

  `!` ↔️ NOT
• Order the logical operators in Boolean expressions in Java according to their precedence:

  1️⃣ NOT (!)

  2️⃣ Comparison operators (==, !=, >, >=, <, <=)

  3️⃣ AND (&&)

  4️⃣ OR (||)
• Order the Boolean operators in Java from highest to lowest precedence.

  1️⃣ NOT (!)

  2️⃣ Comparison (==, !=, >, >=, <, <=)

  3️⃣ AND (&&)

  4️⃣ OR (||)
• Evaluate the Boolean expression: !(5 > 3) || (4 == 4 && 2 < 1).

  false
• Simplifying a complex Boolean expression is a useful debugging strategy.


  True
• Match the Boolean operator with its example:

  Equal to ↔️ `5 == 5`

  Not equal to ↔️ `5 != 3`

  Greater than ↔️ `5 > 3`

  Less than ↔️ `5 < 3`
• The OR operator returns true if at least one of the expressions is true.


  True
• Match the logical operator with its corresponding truth table input and output:

  AND (`&&`) ↔️ true && true = true

  OR (`||`) ↔️ true || false = true

  NOT (`!`) ↔️ !true = false
• The NOT operator has the highest precedence in Boolean expressions.


  True
• Comparison operators in Java have higher precedence than logical AND.


  True
• In the Boolean expression `!(5 > 3) || (4 == 4 && 2 < 1)`, the sub-expression `(2 < 1)` evaluates to false
• What is a common error pattern in Boolean expressions in Java involving operators?

  Using && instead of ||
• Match the application of Boolean expressions with its description:

  Conditional logic ↔️ Executing code based on a specific condition

  Iteration control ↔️ Repeating a code block until a condition is met

  Error handling ↔️ Checking for and responding to errors
• What are Boolean expressions used for in programming?

  Decision making and control flow
• Match the Boolean operator with its meaning:

  == ↔️ Equal to

  >= ↔️ Greater than

  <= ↔️ Less than or equal to
• The OR operator returns true if at least one expression is true.


  True
• Match the truth table with the corresponding operator:

  AND ↔️ True only if both inputs are true

  OR ↔️ True if at least one input is true
• What happens if both expressions in an AND operation are false?

  The result is false
• The OR operator (`||`) returns true if at least one expression is true.

  True
• Truth tables summarize the behavior of logical operators
• Which operator has the highest precedence in Boolean expressions in Java?

  NOT (!)
• Truth tables are used to evaluate complex Boolean expressions by considering all possible combinations of truth values.


  True
• The AND operator returns true only if both expressions are true.


  True
• What is a common error pattern in Boolean expressions where `&&` is used instead of `||`?

  Incorrect operator
• What are Boolean expressions used for in programming?

  Decision making