Please assist with my code keep getting an variable sc error

Question

I'm trying to create a Java program that prompts the user to enter a number well guess the number with a void method called CheckNum (int num) and the decision statements in the void method CheckNum, checks if the number entered is 100, if that is true, the following message “Number is correct!"

So far this is what I have created:

import java.util.Scanner;

public class Main
{

    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        checkNum();
    }

    public static void checkNum()
    {

        System.out.println("Enter a number: ");
        int guess= sc.nextInt();
        int number=(int)(Math.random()*100)+1;
        System.out.println("The number is "+number);
        if(guess>=1 && guess<=100)
        {
            if(guess==number)
                System.out.println("The number is right!");
            else
                System.out.println("Wrong!");
        }
        else
        {
            System.out.println("Make it a 1-100 please!");
            checkNum();
        }


    }
}

Hello Neo, welcome to StackOverflow. Can you post the error message as well? — Sinan Yaman, Apr 27 '20 at 15:57
The variable `sc` is out of scope, you can't simply use variable form other methods — azro, Apr 27 '20 at 15:57
cc is not in the checkNum scope. Either pass it to the function when you call it, or create cc inside the checkNum method. — Amir MB, Apr 27 '20 at 15:59
Hi @Sinan, the error that I was getting indicated: symbol variable sc, java cannot find symbol. — Neo, Apr 28 '20 at 20:07
I tried the below suggestion and the program ran without errors — Neo, Apr 28 '20 at 20:08

azro · Answer 1 · 2020-04-27T16:01:24.423

You can't just use variable from other method. Here are options for you

Define the Scanner as static for the class

public class Main{
    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args){
        checkNum();
    }
    public static void checkNum(){...}
}

Pass the Scanner as a parameter

public class Main{    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        checkNum(sc);
    }
    public static void checkNum(Scanner sc){...}
}

Define it only in the method

public class Main{    
    public static void main(String[] args){
        checkNum();
    }
    public static void checkNum(){
        Scanner sc = new Scanner(System.in)
        ...
    }
}

@ Azro Thank you very much that cleared the error and the program ran — Neo, Apr 28 '20 at 19:59

Please assist with my code keep getting an variable sc error

1 Answers1