title: Set Environment Variable from shell script
body: <p>I have an environment variable like </p>
  
  <pre><code>ABC_XYZ=false
  </code></pre>
  
  <p>When I <code>echo $ABC_XYZ</code>
  It gives me <code>false</code>
  Now I am inside a script I do these steps</p>
  
  <pre><code>&gt;echo $ABC_XYZ 
  false
  &gt;ABC_XYZ=true
  &gt;echo $ABC_XYZ
  true
  </code></pre>
  
  <p>Now after exiting from the script 
  <code>echo $ABC_XYZ</code> again gives me <code>false</code>
  Any way through which i can set the value as true from inside the script. </p>
  
  <p>Thanks in advance.</p>