title: Insert a element in String array
body: <p>I have string containing n elements.</p>
  
  <p>I want to insert a automatically incremented number to the first position.</p>
  
  <p>E.g
      Data</p>
  
  <pre><code>66,45,34,23,39,83
  64,46,332,73,39,33 
  54,76,32,23,96,42
  </code></pre>
  
  <p>I am  spliting to string to array with split char ','</p>
  
  <p>I want resultant array with a incremented number a first position
  <br></p>
  
  <pre><code>1,66,45,34,23,39,83
  2,64,46,332,73,39,33
  3,54,76,32,23,96,42
  </code></pre>
  
  <p>Please suggest how can I do it.</p>
  
  <p>Thanks</p>