Making an in-game command line. How do I get arguments?

I have a debug console that I use to do things in game rather than doing the continuous hastle of doing everything in code and in the editor. So far there is a simple command called "addItem" and then I have the commands "setHealth", "setHunger" etc.. But I dont want to make an if for each value. e.g 1, 2, 3, 4 etc..

EDIT: Make sure you look at 'ExecuteCommand' method, here lies my problem. I need to find arguments in the string 'inputText'. How do I go about doing that?

How do I check and read arguments? Here is my code:

 using UnityEngine;
 using System.Collections;
 
 public class DebugConsole : MonoBehaviour {
 
     public string COMMAND_addItem = "addItem";
     public string inputText;
     private string log;
 
     public bool commandLine = false;
     private bool enterPressed;
     private bool allowCheats = false;
 
     PlayerInventory playerInventory;
 
     void Start () {
         playerInventory = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerInventory>();
         log += "\nTip: Press ESCAPE to exit debug console";
     }
 
     void Update () {
         if(Input.GetKeyDown ("`"))
             commandLine = !commandLine;
         if(Input.GetKeyDown (KeyCode.Escape) && commandLine)
             commandLine = false;
     }
 
     void OnGUI () {
         enterPressed = false;
         if(commandLine){
             Event e = Event.current;
             if(e.type == EventType.KeyDown && e.keyCode == KeyCode.Return && GUI.GetNameOfFocusedControl() == "debugInput")
                 enterPressed = true;
             if(e.type == EventType.KeyDown && e.keyCode == KeyCode.Escape && GUI.GetNameOfFocusedControl() == "debugInput"){
                 commandLine = false;
                 PauseMenu.paused = false;
             }
             GUI.SetNextControlName("debugInput");
             inputText = GUI.TextField(new Rect(10, 25, Screen.width - 20, 25), inputText, 50);
             GUI.Box (new Rect(10, 55, Screen.width - 20, 400), log);
             if(enterPressed){
                 if(inputText == ""){
                     commandLine = false;
                 } else {
                     ExecuteCommand(inputText);
                     inputText = "";
                 }
             }
         }
     }
 
     void ExecuteCommand(string command){
         //addItem
         if(allowCheats){
             if(command == "addItem 0"){
                 playerInventory.AddItem(0);
                 log += "\nAdding item ID 0 (FRUIT_APPLE) to your inventory";
             } else if(command == "addItem 1"){
                 log += "\nCannot add item ID 1 to inventory. Item ID '1' is NULL";
             } else if(command == "addItem 2"){
                 playerInventory.AddItem(2);
                 log += "\nAdding item ID 2 (FRUIT_ORANGE) to your inventory";
             }
         }
 
         //allowCheats
         if(command == "allowCheats true"){
             allowCheats = true;
             log += "\nCheats set to: true (Allowed)";
         } else if (command == "allowCheats false"){
             allowCheats = false;
             log += "\nCheats set to: false (Disallowed)";
         }
 
         //setStatus
         if(allowCheats){
             if(command.StartsWith("setHealth")){
                 
             } else if(command.StartsWith("setHunger")){
                 
             } else if(command.StartsWith("setThirst")){
                 
             } else if(command.StartsWith("setStamina")){
                 
             }
         } else {
             log += "<color=red>Not allowed to use cheats!</color>";
         }
     }
 
 }