ParticleSystem.MainModule.loop

Description

Is the particle system looping?

If you disable looping on a playing particle system, it will stop after the end of the current loop.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var main = ps.main;
        main.loop = true;
    }
}