The video tutorial covers the basics of functions, including setting up variables, understanding function scope, and the difference between local and global variables. It explains how to add parameters to functions, set default values, and handle undefined values using ternary operators. The tutorial emphasizes the importance of meaningful variable naming and provides strategies for error prevention and best practices in function execution.

What is the main purpose of the 'add' function introduced in the first section?

• To add two numbers

• To divide two numbers

• To subtract two numbers

• To multiply two numbers

Why is it important to use meaningful variable names?

• To avoid confusion and improve code readability

• To make the code run faster

• To reduce the size of the code

• To increase the number of variables

What happens when you pass a parameter that is not defined in the function?

• The function will return zero

• The function will return undefined

• The function will return a default value

• The function will return an error

How can you set a default value for a parameter in a function?

• By using a switch case

• By using a ternary operator

• By using a loop

• By using a conditional statement

What is the result of multiplying a number by an undefined parameter?

• Zero

• Infinity

• One

• Not a Number (NaN)

What is a potential issue when passing zero as a parameter?

• It may be reset to a default value

• It will be ignored by the function

• It will cause the function to crash

• It will always be treated as a positive number

Which operator can be used to assign a default value if a parameter is undefined?

• XOR operator

• NOT operator

• OR operator

• AND operator