Define position of line by parameters (Tikz)

Question

It is possible to give in the coordinate of the point by an outside variable?

For example, I have a simple line:

\begin{document}

\draw (0,0) -- (5,5);

\end{document}

I would like to parametrize the x-coordinate, such as:

\begin{document}

*(some command that defines y)* y = 10;

\draw (0,y) -- (5,5+y);

\end{document}

I am familiar with the command coordinate: Define a variable in TikZ

But with it I need to add coordinate of the point. I would like to parametrize one coordinate.

Reason?

I have two drawings in the same Tikz picture, one above the other. It is very likely that I will want to adjust the distance between them. The solution above would enable me to simply "shift" one of the figures up or down by changing the value of y associated with every y coordinate.

Answer 1

As already mentioned in the answers to the question you linked, you can do that. Just define a macro outside of the tikz environment. You can then use this macro in each of the multiple tikz pictures.

\documentclass{article}
\usepackage{tikz}
\begin{document}
\newcommand{\myvalue}{10}

First Tikz Picture

\begin{tikzpicture}
    \draw (0,\myvalue) -- (5,5+\myvalue);
\end{tikzpicture}

Second Tikz Picture

\begin{tikzpicture}
    \draw (0,\myvalue) -- (1,1+\myvalue);
\end{tikzpicture}
\end{document}