how to detect if the left mouse button is being pressed in Unity code example

Example 1: how to detect a mouse click in unity

using UnityEngine;
using System.Collections;

		if (Input.GetMouseButtonDown(0)) {
        	//Left Mouse Button
        } else if (Input.GetMouseButtonDown(1)) {
        	//Right Mouse Button
        } if (Input.GetMouseButtonDown(2)) {
        	//Middle Mouse Button
        }

Example 2: How to detect single mouse click in Unity

void OnMouseUp() {   /*Do whatever here as per your need*/ }  As well as you can use    void OnMouseDown() {   /*Do your stuff here*/ }