Unit #4

Nora, Aiden, and William are solving math puzzles together. Which of the following best describes what an expression is?

• An expression evaluates to a single value.

• An expression always contains a variable.

• An expression must include a function call.

• An expression changes the value of a variable.

Imagine Samuel wants to update his score in a game. What tool does he use to change the value stored in his score variable?

• An assignment operator creates a new variable.

• An assignment operator changes the value represented by a variable.

• An assignment operator deletes a variable.

• An assignment operator evaluates a Boolean expression.

Imagine Benjamin and Scarlett are coding together. Benjamin asks, "What is a variable in programming?" Scarlett thinks she knows! Can you help them out?

• A variable is a type of function.

• A variable is a sequence of characters.

• A variable is a Boolean expression.

• A variable is a named reference to a value.

Abigail is helping William and Mason with their coding homework. She asks, "Hey, can anyone tell me what a string is?"

• A string is a numeric value.

• A string is an ordered sequence of characters.

• A string is a Boolean expression.

• A string is a function call.

Abigail and Mason are having a debate: Abigail says a Boolean value is either true or false, while Mason thinks it might be a string or a number. Who is correct? What is a Boolean value?

• A Boolean value is a numeric value.

• A Boolean value is either true or false.

• A Boolean value is a string of characters.

• A Boolean value is a complex expression.

Abigail, Aiden, and Hannah are coding together. They want to know: What do comparison operators do in programming?

• Comparison operators indicate a Boolean expression.

• Comparison operators change the value of a variable.

• Comparison operators create new variables.

• Comparison operators evaluate to a string.

Mia and Emma are having a debate in class: When you use logical operators, what kind of result do you get?

• Logical operators evaluate to a numeric value.

• Logical operators create new variables.

• Logical operators evaluate to a Boolean value.

• Logical operators change the value of a string.

Luna and Aiden are coding a game. They want their character to jump only if the player presses the spacebar. What programming tool should they use to make this decision?

• A conditional statement executes different statements based on a Boolean expression.

• A conditional statement always executes all statements.

• A conditional statement evaluates to a string.

• A conditional statement creates a new variable.

Harper, Abigail, and Emma are coding together. They stumble upon something called a "function" in their program. What is a function in programming?

• A function is a type of variable.

• A function is a Boolean expression.

• A function is an assignment operator.

• A function is a named group of programming instructions.

Imagine Grace, Mia, and Aria are coding together. What happens when one of them makes a function call?

• A function call creates a new function.

• A function call changes the value of a variable.

• A function call evaluates a Boolean expression.

• A function call executes the code within a function.