title: install julia language
body: <p>I use a Mac running Mountain lion.</p>
  <p>When I finish installing the Julia from <a href="https://github.com/JuliaLang/julia" rel="nofollow noreferrer">https://github.com/JuliaLang/julia</a> , i could not understand this:</p>
  <blockquote>
  <p>Once it is built, you can either run the julia executable using its full path in the directory created above, or add that directory to your executable path so that you can run the Julia program from anywhere (in the current shell session):</p>
  <p>In bash:<br />
  <code>export PATH=&quot;$(pwd):$PATH&quot;</code></p>
  </blockquote>
  <p>So now, every time in terminal, i could only use cd Julia, and then ./Julia to open Julia.</p>