How do you get your player to jump smoothly?

Questions & Answers
1

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class player_movement : MonoBehaviour {

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
        float cj = Time.time + 1.5f;
		float x = Input.GetAxis("Horizontal") * Time.deltaTime * 100.0f;
        float z = Input.GetAxis("Vertical") * Time.deltaTime * 15.0f;
        transform.Rotate(0, x, 0);
        transform.Translate(0, 0, z);
        if (Input.GetKeyDown("space")) {
            for (int i = 0; i < 10; i++) {
                transform.Translate(0, 5, 0);
            }
        }
    }
}
2

Note:

for (int i = 0; i < 10; i++) {
 transform.Translate(0, 5, 0);
}

This is all done in one update. That means, you might as well type transform.Translate(0, 50, 0);

Attach a Rigidbody to your gameObject, and use Rigidbody.AddForce() to make it jump smoothly.