Thread: String input = keyboard.nextLine();

import java.util.Scanner;
 
public class beraknaTal {
 
	public static void main(String[] args) {
		Scanner keyboard = new Scanner(System.in);
 
 
	int resultat, tal1, tal2;
 
 
	System.out.print("Ange ett heltal: ");
			tal1 = keyboard.nextInt();
		System.out.print("Ange ett till heltal: ");
			tal2 = keyboard.nextInt();
 
	do{	
		System.out.print(+tal1 + "+" +tal2 +"= ");
		resultat = keyboard.nextInt();
		}
 
	while(resultat != tal1 + tal2);
 
                System.out.println("You answered right, would you like to continue Yes or No ");
 
		String input = keyboard.nextLine();
 
		if (input.equals("No"))
			System.out.println("Du behöver öva mer matematik");
		if (input.equals("Yes"))
			System.out.println("Då fortsätter vi då");

Why isnt it possible to write yes or no in the console=/?