title: Character variable with dynamic length
body: <p>Is there any way to declare char variable (or maybe string) with the length which is calculated dynamically? This coding clarifies what I want:</p>
  
  <pre><code>DATA: len TYPE i,
        a   TYPE i,
        b   TYPE i.
  len = a + b.
  DATA: var(len) TYPE с.
  </code></pre>
  
  <p>Do not propose solutions with CREATE DATA and/or field symbols: I've tried them but they are not applicable in my case.
  The intention of such declaration is adding leading zeroes and/or apply other logic to this string. Therefore string is to be declared <strong>strictly</strong>!</p>
  
  <p>Any proposals?</p>