title: Value of global variable doesn't change in BASH
body: <p>I am working on a BASH script which has a global variable. The value of the variable changes in a function/subroutine. But the value doesnt change when I try to print that variable outside the function.
  The Sample code is as follows:</p>
  
  <pre><code>#!/bin/bash
  
  count=
  
  linux_f()
      {
          let count=100
      }
  
  linux_f
  
  echo $count
  </code></pre>
  
  <p>The echo statement prints blank and not 100
  Why the value of the global variable doesn't traverse in the function and out.</p>