When declaring a variable with the var keyword, you need to provide a name for the variable. This name is called an identifier and follows certain rules. It should start with a letter or an underscore (_), and it can contain letters, numbers, or underscores.
Here’s an example of declaring a variable using the var keyword:
In this case, we declared a variable named myVariable. However, at this point, the variable doesn’t have any value assigned to it. It’s like an empty box waiting to be filled.
To assign a value to a variable, you can use the assignment operator (=) followed by the desired value:
myVariable = 42;
You can also declare and assign a value to a variable in one line:
var anotherVariable = “Hello!”;
In this case, we declared a new variable named anotherVariable and assigned it the string value “Hello!”.
Variables declared with var have function scope or global scope depending on where they are declared. Function scope means that variables are accessible only within the function they are declared in. Global scope means that variables can be accessed from anywhere in your code.