Version: 2019.1
public bool wholeNumbers ;

Description

Should the value only be allowed to be whole numbers?

using UnityEngine;
using System.Collections;
using UnityEngine.UI; // Required when Using UI elements.

public class Example : MonoBehaviour { public Slider mainSlider;

public void Start() { //sets the slider's value to accept whole numbers only. mainSlider.wholeNumbers = true; } }