Trying to follow Brackeys' 1st person tutorial, but I've received an unexpected error

Unity Engine
1

So I was following the Brackeys first person controller tutorial, and then while creating gravity, I got both Error CS1002 and Error CS1525. 1002 is for a missing semicolon, but I can’t find it for the life of me. And Error CS1525 is “Invalid expression term ‘+=’”. This is my code, so if someone could help out that’d be great.

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

public class PlayerMovement : MonoBehaviour
{

public CharacterController controller;

public float speed = 12f;
public float gravity = -9.81f;

Vector3 velocity;

// Update is called once per frame
void Update()
{
float x = Input.GetAxis(“Horizontal”);
float z = Input.GetAxis(“Vertical”);

Vector3 move = transform.right * x + transform.forward * z;

controller.Move(move * speed * Time.deltaTime);

velocity y += gravity * Time.deltaTime;

controller.Move(velocity * Time.deltaTime);
}
}

2

Hey and welcome.
You can easily find these by looking really closely at what is different between your code and the tutorial one. Also, the error codes are rather useless. The full error message would be more valuable, as it includes the line the error occurs on. To make that even more useful, please use code tags when posting code examples, as those will add syntax highlighting as well as line numbers.

As for your problems.
You wrote velocity y = …, but meant velocity.y ← pay attention to the dot!
This accesses the y variable of the velocity object. What you wrote seems more like a declaration.

I cant find the missing semicolon either. However, if the compiler complains about a missing semicolon, it might as well be a missing bracket, or the above, or something else which confuses the compiler, and thus leads to it thinking that there should be an end of line somewhere, even if that’s not the actual mistake. Either way, having properly formatted code (code tags) and the full error message would make it a lot easier to help here :slight_smile:

1 Like
3

Remember: NOBODY here memorizes error codes. That’s not a thing. The error code is absolutely the least useful part of the error. It serves no purpose at all. Forget the error code. Put it out of your mind.

The complete error message contains everything you need to know to fix the error yourself.

In this case you have omitted a period, which to the compiler makes it think you meant to terminate the statement with a semicolon.

Always start with the FIRST error in the console window, as sometimes that error causes or compounds some or all of the subsequent errors.

The important parts of the error message are:

  • the description of the error itself (google this; you are NEVER the first one!)
  • the file it occurred in (critical!)
  • the line number and character position (the two numbers in parentheses)
  • also possibly useful is the stack trace (all the lines of text in the lower console window)

All of that information is in the actual error message and you must pay attention to it. Learn how to identify it instantly so you don’t have to stop your progress and fiddle around with the forum.

Tutorials and example code are great, but keep this in mind to maximize your success and minimize your frustration:

How to do tutorials properly:

Tutorials are a GREAT idea. Tutorials should be used this way:

Step 1. Follow the tutorial and do every single step of the tutorial 100% precisely the way it is shown. Even the slightest deviation (even a single character!) generally ends in disaster. That’s how software engineering works. Every single letter must be spelled, capitalized, punctuated and spaced (or not spaced) properly. Fortunately this is the easiest part to get right. Be a robot. Don’t make any mistakes. BE PERFECT IN EVERYTHING YOU DO HERE.

If you get any errors, learn how to read the error code and fix it. Google is your friend here. Do NOT continue until you fix the error. The error will probably be somewhere near the parenthesis numbers (line and character position) in the file. It is almost CERTAINLY your typo causing the error, so look again and fix it.

Step 2. Go back and work through every part of the tutorial again, and this time explain it to your doggie. See how I am doing that in my avatar picture? If you have no dog, explain it to your house plant. If you are unable to explain any part of it, STOP. DO NOT PROCEED. Now go learn how that part works. Read the documentation on the functions involved. Go back to the tutorial and try to figure out WHY they did that. This is the part that takes a LOT of time when you are new. It might take days or weeks to work through a single 5-minute tutorial. Stick with it. You will learn.

Step 2 is the part everybody seems to miss. Without Step 2 you are simply a code-typing monkey and outside of the specific tutorial you did, you will be completely lost. If you want to learn, you MUST do Step 2.

Of course, all this presupposes no errors in the tutorial. For certain tutorial makers (like Unity, Brackeys, Imphenzia, Sebastian Lague) this is usually the case. For some other less-well-known content creators, this is less true. Read the comments on the video: did anyone have issues like you did? If there’s an error, you will NEVER be the first guy to find it.

Beyond that, Step 3, 4, 5 and 6 become easy because you already understand!

Finally, when you have errors… see the top of this post!

1 Like
4

Thanks! You were correct about the missing period. On the tutorial, the colour scheme is different, so the period is red, and I missed it entirely. Thanks!