Mathf.CeilToInt

public static int CeilToInt (float f);

説明

f 以上の最小の整数を返します。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Example() {
        Debug.Log(Mathf.CeilToInt(10.0F));
        Debug.Log(Mathf.CeilToInt(10.2F));
        Debug.Log(Mathf.CeilToInt(10.7F));
        Debug.Log(Mathf.CeilToInt(-10.0F));
        Debug.Log(Mathf.CeilToInt(-10.2F));
        Debug.Log(Mathf.CeilToInt(-10.7F));
    }
}