title: Get a list of current variables in Julia Lang
body: <p>I am new to Julia Lang. I am coming from the background of Matlab. </p>
  
  <p>In Matlab, when pressing <code>whos</code> command I will get all variables in the current scope; and also, I can store them in another variable like <code>x=whos;</code> Is there such commands exists in Julia?
  Example code in Matlab:</p>
  
  <pre><code>&gt;&gt; a=3;
  &gt;&gt; b=4;
  &gt;&gt; whos
  Variables in the current scope:
  
  Attr Name        Size                     Bytes  Class
  ==== ====        ====                     =====  ===== 
      a            1x1                          8  double
      b            1x1                          8  double
      prefix       1x16                        16  char
  
  Total is 18 elements using 32 bytes.
  </code></pre>