The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - What Are Enums in Solidity

The video tutorial explains enums in programming, focusing on their use in Solidity. Enums restrict variables to predefined values, reducing bugs. The tutorial demonstrates setting up enums, initializing them, and creating functions to manipulate and retrieve enum values. A practical example using French fries sizes illustrates these concepts, showing how to set default values and change them through functions.

What is the primary benefit of using enums in programming?

• They increase the complexity of the code.

• They make code execution faster.

• They allow for unlimited variable values.

• They help reduce bugs by restricting variable values.

In the example provided, what is the purpose of the 'French fries size' enum?

• To store the nutritional information of French fries.

• To calculate the price of French fries.

• To define different sizes of French fries.

• To list different types of French fries.

How can you set a default value for an enum in Solidity?

• By using the 'static' keyword.

• By using the 'default' keyword.

• By using the 'constant' keyword.

• By assigning a value directly to the enum.

What keyword is used to ensure a default enum value does not change?

• constant

• immutable

• final

• static

Which function allows users to change the size of French fries in the example?

• setSize

• changeSize

• setSmall

• updateSize

What does the 'getChoice' function return in the example?

• The default size of French fries.

• The current choice of French fries size.

• The price of the selected French fries size.

• The nutritional value of the selected French fries size.

How are enum values represented when returned as integers?

• As negative numbers.

• As floating-point numbers.

• Starting from 0.

• Starting from 1.