title: Defining and calling variables in shell script
body: <p>I want to define variable in shell script as:</p>
  
  <pre><code>value1 = 40  (this can be number or character)
  </code></pre>
  
  <p>and want to use as in a text like:</p>
  
  <pre><code>$value1_position.xyz (I basically want 40_position.xyz)
  </code></pre>
  
  <p>How do I do this?</p>