title: create racket accumulator "variable"
body: <p>Im really having problems understanding how I can create variable that would act as an  accumulator in racket.  This is definitely a really stupid question....but racket's documentation is pretty difficult for me to read.</p>
  
  <p>I know I will use some kind of define statement or let statement.  </p>
  
  <p>I want to be able to pass a number to a variable or function and it adds the current value with the new value keeps the sum...How would I do this....?? Thank you..</p>
  
  <pre><code>(define (accumulator newvalue) "current=current+newvalue" 
  </code></pre>
  
  <p>something like this..</p>