MenuExampleComponent.cs

using UnityEngine;
using System.Collections;

public class MenuExampleComponent : MonoBehaviour
{

    [ContextMenuItem("Modify/Increment", "IncrementValue")]
    [ContextMenuItem("Modify/Decrement", "DecrementValue")]
    [ContextMenuItem("Round", "RoundValue")]
    [ContextMenuItem("Reset", "ResetValue")]
    public float aFloatValue = 0.0f;

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}

    [ContextMenu("Reset Value")]
    void ResetValue()
    {
        aFloatValue = 0.0f;
    }

    void IncrementValue()
    {
        aFloatValue += 1.0f;
    
    }

    void DecrementValue()
    {
        aFloatValue -= 1.0f;
    }

    void RoundValue()
    {
        aFloatValue = Mathf.Round(aFloatValue);
    }
}