title: Built in Binary Conversion in Scheme/Lisp
body: <p>Is there a built in binary to decimal conversion function in Scheme?</p>
  
  <p>I've found the built in <code>number-&gt;string</code> conversion which can convert binary to decimal form. </p>
  
  <p>However, the opposite <code>string-&gt;number</code> doesn't convert decimals to binary string like I'd thought. </p>
  
  <p>Is there a built in function or would we have to define it?</p>