JavaScript Functions Quiz

What is a JavaScript function?

• A variable that stores a string value.

• A single line of code that runs only once.

• A block of code that can be executed multiple times from different parts of your program.

• A loop that iterates through an array.

How do you define a JavaScript function?

• Using the function keyword followed by the function name and parameters in parentheses.

• Using the if statement followed by curly braces.

• Using the let keyword followed by the function name.

• Using the console.log statement.

What is the purpose of parameters in a JavaScript function?

• To define the function name.

• To specify the values that the function accepts when called.

• To declare variables within the function.

• To print output to the console.

How do you call a JavaScript function?

• By using the let keyword.

• By using the return statement.

• By using the if statement.

• By using its name followed by parentheses containing the parameters.

What does the return statement do in a JavaScript function?

• Ends the function execution.

• Declares a new variable.

• Prints a message to the console.

• Returns a value from the function.

What is the scope of variables declared within a JavaScript function?

• Accessible only within if statements.

• Accessible only within loops.

• Global and can be accessed from anywhere in the program.

• Local to that function and cannot be accessed from outside the function.

What is a best practice for JavaScript function names?

• Choose descriptive names that indicate the function's purpose.

• Use short and random names.

• Use special characters in function names.

• Use numbers as function names.

How can you make JavaScript functions more flexible and reusable?

• Use parameters.

• Use global variables.

• Use nested functions.

• Use the break statement.

What is the purpose of using meaningful function names?

• To increase the complexity of the code.

• To confuse other programmers.

• To save memory space.

• To make the code more readable and understandable.

Why should functions be kept short and simple?

• To use more memory space.

• To make the code longer and more complicated.

• To break down complex tasks into manageable parts.

• To slow down the program execution.