How to write a script to move a 2d character?

Question

C++ / C#

Hello everyone, don’t judge strictly, I’ve been trying to write a script for character movement,
I just started making games not long ago and I can’t write a C # script in Unity. It knocks out errors, although I wrote everything normally, even rewrote it a bunch of times, I think you can help, I tried to make control A and D and SPACE and that's it, but it doesn't work.

Answer 1

In Google translate, you can translate the text of the error and understand that your code uses the MovementSpeed ​​variable, which you did not set anywhere, that is, the program does not know what this variable is and what its value is. This is what your code is complaining about.

Answer 2

I made a mistake in the variables and the variable didn't work
public float MivementSpeed ​​= 1;
public float JumpForce = 1f;
Corrected It is necessary Movement and not Mivement such a small mistake and I sat on it for 3 hours thanks a lot again.