Understanding Constants in Programming

The video tutorial explains the concept of constants in programming, highlighting their importance in ensuring consistent values, like the mathematical constant pi. It details how to create constants using the 'final' keyword, the naming conventions for constants, and their usage in code. Additionally, it covers the concept of static and final variables within classes, using examples like a bakery's pricing model to illustrate these concepts.

What is a constant in programming?

• A loop that runs indefinitely

• A function that returns a fixed value

• A variable that cannot change its value

• A variable that can change its value

Why is the value of pi considered a constant?

• Because it is used in science

• Because it never changes

• Because it is a variable

• Because it can be modified

Which keyword is used to declare a constant in programming?

• immutable

• final

• static

• const

What is the correct way to name a constant variable?

• Using numbers and symbols

• Using all lowercase letters

• Using camelCase

• Using all uppercase letters with underscores

In the example of the bakery, what is the value of the sugar cookie price constant?

• 4.19

• 3.19

• 2.19

• 1.99

What happens if you try to change the value of a constant?

• The program will crash

• The program will run normally

• The program will ignore the change

• The program will give an error

Why is it beneficial that constants cannot be changed?

• It makes the code run faster

• It ensures consistent values throughout the program

• It allows for more flexible code

• It reduces the size of the code

What does it mean for a final variable to be static?

• It can be changed by any instance of a class

• It is only accessible within a single method

• It can be accessed by any instance of a class

• It is only accessible within a single class

In the bakery example, what is the purpose of making the child discount variable static and final?

• To make it run faster

• To ensure it can be accessed by any instance of the class

• To allow it to be changed by any instance of the class

• To reduce the size of the code

What keyword is used to create constants in programming?

• const

• static

• final

• immutable