How can I take the user input from a scanner and use the input as a numerical (double) variable?

Question

How can I take the user input from a scanner and use the input as a numerical (double) variable?
//example

System.out.println("What is your age?");
Scanner age = new Scanner(System.in);
System.out.println(age.nextLine());

System.out.println("You are almost " + (age + 1));

//It's claiming that I can't use equations between scanners and doubles. What's a way //around this?
//Thanks!

Answer 1

A+
Thank you very much!

Answer 2

you could do something like this:

System.out.println("What is your age?");
Scanner inp = new Scanner(System.in);
double age = inp.nextDouble();

System.out.println("You are almost " + (age + 1));