Adding Values - How To Get Total Score

Alright, so i'm working on this and what I want to do is calculate all of the answers when the values of the correct answer = 1 and the incorrect answer = -1 so at the end of the test I can calculate answer + answer2 + answer3 and so on to get a total score...How do I do this? I've been looking online for 3 hours and i'm just stumped.

import java.util.Scanner;
class HorticultureQuiz {
public static void main(String[] args){
String name;
String major;
String confidence;
 
[Code] ....

I thought I could make each answer = to 1 but then I would need a -1 if the answer was incorrect so I tried this.

char answer = sc.nextLine().toLowerCase().charAt(0);
if (answer == 't' || answer == 'T')
answer = 1;
{
System.out.print("Great Job, that is correct!");
} else
answer = -1;
{
System.out.print("Correct answer is false"); }

but that doesn't work!