In Pine Script, variables are defined using the var keyword, followed by the variable name and an assignment operator (=). The value assigned to the variable can be a constant value, the result of an expression, or the result of a function call.

Here are a few examples of how to define variables in Pine Script:

• Define a variable with a constant value:

•  Define a variable with the result of an expression:

• Define a variable with the result of a function call:

• You can also specify the type of variable while defining it, like

• It is also possible to define a variable with a default value that can be overridden by a user input, for example:

 This will create a variable named myVariable with a default value of 10, but the user can enter a different value between 1 and 100.

Please note that it's important to give a meaningful name to the variables so that it's easy to understand the purpose of the variable when reading the code. Also, it's a good practice to initialize the variable with a value or a default value.