Prerequisite:

   // Variable ( name ) values can be update with new value.
   let name = 'Naresh';
   name = 'Siva';
   console.log(name);
   // Output: Siva

Task 1: Declare constant variables and update value

  // Constant Variable (department) value cannot be modified. 
   const department = 'CSE';
   department = 'IT'; // It should throw error
   console.log(department);

Questions #1:

• When you modify constant variable value, what is the error you will get ?

    Uncaught TypeError: Assignment to constant variable.