How to touch anywhere on screen?

Hello all, I had searched how to touch anywhere on screen and found : if(Input.GetMouseButtonDown(0)) { //Do something } I tried it and it worked fine. Then I needed to record a swipe . Followed a tutorial online and got the following script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 
 public enum SwipeDirection
 {
     None= 0,
     Left=1,
     Right = 2,
     Up = 4,
     Down = 8,
 }
 
 
 public class SwipeManager : MonoBehaviour {
 
     private static SwipeManager instance;
     public static SwipeManager Instance {get{return instance;}}
     public SwipeDirection Direction { set; get; }
     private Vector3 TouchPosition;
     private float SwipeResistanceX = 50f;
     private float SwipeResistanceY = 100f;
 
 
     // Use this for initialization
     void Start () {
         instance = this;
     }
     
     // Update is called once per frame
     void Update () {
 
         Direction = SwipeDirection.None;
 
         if(Input.GetMouseButtonDown(0))
         {
             TouchPosition = Input.mousePosition;
         }
         if(Input.GetMouseButtonUp(0))
         {
             Vector2 DeltaSwipe = TouchPosition - Input.mousePosition;
 
             if(Mathf.Abs(DeltaSwipe.x) > SwipeResistanceX)
             {
                 //x
                 Direction |= (DeltaSwipe.x < 0) ? SwipeDirection.Right : SwipeDirection.Left;
             }
 
             if (Mathf.Abs(DeltaSwipe.y) > SwipeResistanceY)
             {
                 //y
                 Direction |= (DeltaSwipe.y < 0) ? SwipeDirection.Up: SwipeDirection.Down;
             }
 
             
         }
 
 
 
     }
 
 
 
     public bool IsSwiping(SwipeDirection dir)
     {
         return (Direction & dir) == dir;
     }
 
 
 }

And now each time I swipe , it also does the code for the press anywhere my question is what is the right way to implement both? I already thought about delta being 0 for press anywhere but then thought that i couldn't do anything until player decides to get his finger off the screen. Please help Thanks a lot in advance.