I need help with an error please

I have an error
Assets/Scripts/Game_controler.cs(84,10): error CS0161: 'Game_controler.WinnerCheck()': not all code paths return a value
there is my script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class Game_controler : MonoBehaviour {
7.  
8.     public int whoseTurn; //0 = x and 1 = o
9.     public int turnCount; // counts the number of turns played
10.     public GameObject[] turnIcons; // displays whos turn it is
11.     public Sprite[] playIcons; //0 = x icon and 1 = o icon
12.     public Button[] tictactoeSpaces;//playable spaces for our game
13.     public int[] markedSpaces;//Id's which spaces was marked by which player
14.     public Text winnerText;//Holds the text component of the winner text
15.     public GameObject[] winningLine;// hold all the differtent lines to show that theres a winner
16.     public GameObject winnerPanel;
17.     public int xPlayersScore;
18.     public int oPlayersScore;
19.     public Text xPlayersScoreText;
20.     public Text oPlayersScoreText;
21.     public Button xPlayersButton;
22.     public Button oPlayersButton;
23.     public GameObject drawImage;
24.  
25.     // Start is called before the first frame update
26.     void Start()
27.     {
28.         GameSetup();
29.     }
30.     void GameSetup()
31.     {
32.         whoseTurn = 0;
33.         turnCount = 0;
34.         turnIcons[0].SetActive(true);
35.         turnIcons[1].SetActive(false);
36.         for(int i = 0; i < tictactoeSpaces.Length; i++)
37.         {
38.             tictactoeSpaces[i].interactable = true;
39.             tictactoeSpaces[i].GetComponent<Image>().sprite = null;
40.         }
41.         for(int i = 0; i < markedSpaces.Length; i++)
42.         {
43.             markedSpaces[i] = -100;
44.         }
45.     }
46.  
47.  
48.     // Update is called once per frame
49.     void Update()
50.     { }
51.         public void TicTacToeButton(int WhichNumber)
52.     {
53.         xPlayersButton.interactable = false;
54.         oPlayersButton.interactable = false;
55.         tictactoeSpaces[WhichNumber].image.sprite = playIcons[whoseTurn];
56.         tictactoeSpaces[WhichNumber].interactable = false;
57.  
58.  
59.         markedSpaces[WhichNumber] = whoseTurn+1;
60.         turnCount++;
61.         if(turnCount > 4)
62.         {
63.             bool isWinner = WinnerCheck();
64.             if(turnCount == 9 && isWinner == false)
65.             {
66.              Draw();
67.             }
68.         }
69.  
70.         if (whoseTurn == 0)
71.         {
72.             whoseTurn = 1;
73.             turnIcons[0].SetActive(false);
74.             turnIcons[1].SetActive(true);
75.         }
76.         else
77.         {
78.             whoseTurn = 0;
79.             turnIcons[0].SetActive(true);
80.             turnIcons[1].SetActive(false);
81.         }
82.  
83.     }
84.     bool WinnerCheck()
85.     {
86.         int s1 = markedSpaces[0] + markedSpaces[1] + markedSpaces[2];
87.         int s2 = markedSpaces[3] + markedSpaces[4] + markedSpaces[5];
88.         int s3 = markedSpaces[6] + markedSpaces[7] + markedSpaces[8];
89.         int s4 = markedSpaces[0] + markedSpaces[3] + markedSpaces[6];
90.         int s5 = markedSpaces[1] + markedSpaces[4] + markedSpaces[7];
91.         int s6 = markedSpaces[2] + markedSpaces[5] + markedSpaces[8];
92.         int s7 = markedSpaces[0] + markedSpaces[4] + markedSpaces[8];
93.         int s8 = markedSpaces[0] + markedSpaces[4] + markedSpaces[6];
94.         var solutions = new int[] { s1, s2, s3, s4, s5, s6, s7, s8 };
95.         for (int i = 0; i < solutions.Length; i++)
96.         {
97.             if(solutions[i] == 3*(whoseTurn+1))
98.             {
99.                 WinnerDisplay(i);
100.                 return true;
101.             }
102.             return false;
103.         }
104.         void WinnerDisplay(int indexIn)
105.         {
106.             winnerPanel.gameObject.SetActive(true);
107.             if (whoseTurn == 0)
108.             {
109.                 xPlayersScore++;
110.                 xPlayersScoreText.text = xPlayersScore.ToString();
111.                 winnerText.text = "Player X Won!";
112.             }
113.             else if(whoseTurn == 1)
114.             {
115.                 oPlayersScore++;
116.                 oPlayersScoreText.text = oPlayersScore.ToString();
117.                 winnerText.text = "Player O Won!";
118.             }
119.             winningLine[indexIn].SetActive(true);
120.          
121.                  
122.         }
123.     }
124.     public void Rematch()
125.     {
126.         GameSetup();
127.         for(int i = 0; i < winningLine.Length; i++)
128.         {
129.             winningLine[i].SetActive(false);
130.         }
131.         winnerPanel.SetActive(false);
132.         xPlayersButton.interactable = true;
133.         oPlayersButton.interactable = true;
134.         drawImage.SetActive(false);
135.     }
136.     public void Restart()
137.     {
138.         Rematch();
139.         xPlayersScore = 0;
140.         oPlayersScore = 0;
141.         xPlayersScoreText.text = "0";
142.         oPlayersScoreText.text = "0";
143.     }
144.     public void SwitchPlayer(int whichPlayer)
145.     {
146.         if(whichPlayer == 0)
147.         {
148.             whoseTurn = 0;
149.             turnIcons[0].SetActive(true);
150.             turnIcons[1].SetActive(false);
151.         }
152.         else if(whichPlayer == 1)
153.         {
154.             whoseTurn = 1;
155.             turnIcons[0].SetActive(false);
156.             turnIcons[1].SetActive(true);
157.         }
158.      
159.     }
160.     void Draw()
161.     {
162.         winnerPanel.SetActive(true);
163.         drawImage.SetActive(true);
164.         winnerText.text = "Draw";
165.     }
166. }

please help me !!

 

One issue is that you have one function inside another. Pay attention to your curly brackets: WinnerDisplay is inside WinnerCheck. You need another } before WinnerDisplay and one less at the end of that function.

And, your "return false", I think, should probably be outside the for loop, which would resolve the actual error message.

 

Thank you very much! Your advice was very helpful.