How can you prevent a JavaScript variable from being modified after its initial assignment?OptionsUse the const keywordUse the let keywordUse the var keywordUse the final keyword

You can prevent a JavaScript variable from being modified after its initial assignment by using the const keyword. Once a variable is assigned with const, it cannot be reassigned.

Here's a step-by-step guide:

1. Declare the variable: You start by declaring the variable using the const keyword. For example, const myVariable;

2. Assign a value: Next, you assign a value to the variable. This is done at the same time as the declaration. For example, const myVariable = 'Hello, World!';

3. Try to reassign: If you try to reassign a new value to the variable, JavaScript will throw an error. For example, if you try myVariable = 'Goodbye, World!';, you will get an error.

Please note that const does not make the variable itself immutable, just that the variable identifier cannot be reassigned. For instance, if the variable is an object, the object's contents can be altered.