Variables Continued

We mentioned that we can also change the value of a variable. This applies to variables created with the let or var keywords. Variables created with the const keyword cannot be changed. They are constants. Therefore, they are used only when we do not want to change the variable. For example:

const myName = "Roman";

If we tried to overwrite the value of a constant variable, the program would show an error message.

The last type of variables are those created using the var keyword. The var variables have been in JavaScript the longest, but they are problematic, which is why they were replaced by let variables, which are now the standard. If you want to read an English article about var variables, you can do so here. In this course, we will use only let and const variables.