title: "Variable not found" error issued by the shell
body: <pre><code>if [ "$1" = "" ]
  then
         echo -n "Gib das Startkapital ein: "
         read kapital
  else
         kapital  = $1
  fi
  
  echo $kapital
  </code></pre>
  
  <p>When I say kapital = $1 it says that this variable does not exist:</p>
  
  <pre><code>$ sh zins.sh
  zins.sh: 16: zins.sh kapital: not found
  </code></pre>