The following method that returns the square root of n. c static double sqrt(long n)

Program Approach:

1- As mentioned in the assignment, implement the sqrt method. 
2- Need to import the Math package and the util package.
3- Util package is used to create the object of the scanner class. 
4- Scanner class used to take the input from a user. 
5- Create the method as mentioned in the assignment sqrt() with one parameter.
6- Invoke that method from the main method. 
7- Prompt a message to take input from a user. 
8- Create a variable as a number to store the value entered by a user.
9- Pass that value to the sqrt() method as a parameter. 
10- That method will return the sqrt value and display the output on the screen.
11- Please check the following complete implementation of the sqrt() method and output screenshot.