Cannot convert String to int

This is the script:

using UnityEngine;
using System;

public class DataTranslator : MonoBehaviour
{
    private static string KILL_SYMBOL = "[KILLS]";
    private static string DEATHS_SYMBOL = "[DEATHS]";

    public static int DataToKills(string data)
    {
         return int.Parse (DataToValue(data, KILL_SYMBOL));
    }


    public static int DataToDeaths(string data)
    {
        return int.Parse (DataToValue(data, DEATHS_SYMBOL));
    }


    public static int DataToValue(string data, string symbol)
    {
        string[] pieces = data.Split('/');
        foreach (string piece in pieces)
        {
            if (piece.StartsWith(symbol))
            {
                return piece.Substring(symbol.Length);
            }
        }

        Debug.LogError(symbol +  "not found in" + data);
        return "";
    }
}

And this are the error:

  1. Assets/DataTranslator.cs(17,20): error CS1502: The best overloaded method match for `int.Parse(string)’ has some invalid arguments

2)Assets/DataTranslator.cs(11,28): error CS1503: Argument #1' cannot convert int’ expression to type `string’

  1. Assets/DataTranslator.cs(17,20): error CS1502: The best overloaded method match for `int.Parse(string)’ has some invalid arguments

4)Assets/DataTranslator.cs(17,27): error CS1503: Argument #1' cannot convert int’ expression to type `string’

5)Assets/DataTranslator.cs(28,30): error CS0029: Cannot implicitly convert type string' to int’

  1. Assets/DataTranslator.cs(33,16): error CS0029: Cannot implicitly convert type string' to int’

i can’t understand where is the error

This is because your return type for DataToValue is an int. but you are returning strings from it, change your return type to string and this should remove the errors.