GetInput.keydown code example

Example 1: unity key detection

if (Input.GetKeyDown(KeyCode.Space))
        {
            print("space key was pressed");
        }

Example 2: unity key pressed

using UnityEngine;

public class Egsample_script : MonoBehaviour
{
    [SerializeField] KeyCode your_key;
    //select a key under inspektor
    void Update()
    {
        if (Input.GetKey(your_key))
        {
            print("your selekted key was pressed");
        }
    }
}