Cannot use randomIndex = Random.Range(0, passwordEasy.Length) outside functions ?

Questions & Answers
1

I am using the above expression Random.Range(0, passwordEasy.Length) in two different functions but the issue is that it generates different value of passwordEasy array length and that is not what I want. So I thought I should declare a variable randomIndex outside these functions, but then I get the following error :

A field initializer cannot reference
the non-static field, method, or
property ‘Hacker.passwordEasy’
[Assembly-CSharp]

In the code below you will notice I have used Random.Range(0, passwordEasy.Length) twice in two different functions. I don’t want to do that. Here’s the part of my code I am having issue with :

void CheckPassword(string input)
    
    {
        if (isEasy == true)
        {

            if (input == passwordEasy[Random.Range(0, passwordEasy.Length)]) 
            {
                DisplayWinScreen();
            }
            else
            {
                Terminal.WriteLine("Incorrect Password!");
            }
        }
        else if (isEasy == false)
        {

            if (input == passwordTough[Random.Range(0, passwordTough.Length)])
            {
                DisplayWinScreen();
            }
            else
            {
                Terminal.WriteLine("Incorrect Password!");

            }
        }
        void DisplayWinScreen()
        {
            Terminal.WriteLine("Hey ! Correct Password!");
            currentScreen = Screen.Win;
            ShowLevelReward();
        }

        void ShowLevelReward()
        {
            if (isEasy == true)
            {
                Terminal.WriteLine("EASY WON");
            }
            else if (isEasy == false)
            {
                Terminal.WriteLine("Tough WON");
            }
        }

    }


    void StartGame(int level)
    {
        Terminal.ClearScreen();
        WriteOnScreen();

    }

    void WriteOnScreen(){
        
        if (isEasy == false)
        {
            Terminal.WriteLine("Enter your password, hint : " + passwordTough[Random.Range(0, passwordTough.Length)].Anagram());
        }
        else if(isEasy == true)
        {
            Terminal.WriteLine("Enter your password, hint : " + passwordEasy[Random.Range(0, passwordEasy.Length)].Anagram());
        }
    }
2

@Scavex I would create a private integer variable for the random.range

private int randomEasy;

public void Start()
{
    randomRange = UnityEngine.Random.Range(0, passwordEasy.Length);
}

void CheckPassword(string input)
     
     {
         if (isEasy == true)
         {
 
             if (input == passwordEasy[randomEasy]) 
             {
                 DisplayWinScreen();
             }
             else
             {
                 Terminal.WriteLine("Incorrect Password!");
             }
         }
       
 
       
       
             Terminal.WriteLine("Enter your password, hint : " + passwordEasy[randomEasy].Anagram());
         }
     }