What keyword is used to define a variable in CodeHS?

In CodeHS, the keyword used to define a variable is "var." This keyword is part of JavaScript, which is a programming language often used in the CodeHS platform for teaching animation and game development. When you declare a variable with "var," you are informing the program to allocate memory for that variable so you can store data in it and use that data later in your code.

Using "var" allows programmers to create variables that can hold values, such as numbers or strings, and makes it possible to manipulate those values throughout the program. This is crucial for creating dynamic and interactive applications, where data may change or need to be referenced multiple times.

The other options, while they may be utilized in different programming contexts, are not suited for declaring variables in CodeHS using JavaScript. For example, "let" is also a keyword used in JavaScript but is specifically intended for variables that have block scope, which may not apply in all scenarios. "Define" doesn’t exist as a keyword for declaring variables in JavaScript, and "set" typically refers to assigning values to variables rather than creating them. Understanding the correct usage of these keywords is fundamental for effective programming.