Version: 2019.1
public bool multiLine ;



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

public class Example : MonoBehaviour { public InputField mainInputField;

public void Update() { //Check to see if the input field is set to allow multiple lines. if (mainInputField.multiLine) { //Set the input field to only allow Single Lines, if it is currently set to allow Multiple lines. mainInputField.lineType = InputField.LineType.SingleLine; //Print to console Debug.Log("The main input field is now set to allow single lines only!"); } } }