title: edit ASCII value of a character in bash
body: <p>I am trying to update the ASCII value of each character of a string array in bash on which I want to add 2 to the existing character ASCII value.</p>
  
  <p>Example:</p>
  
  <pre><code>declare -a x =("j" "a" "f" "a" "r")
  </code></pre>
  
  <p>I want to update the ASCII value incrementing the existing by 2 , such "j" will become "l"</p>
  
  <p>I can't find anything dealing with the ASCII value beyond 
  <code>print f '%d' "'$char"</code></p>
  
  <p>Can anyone help me please?</p>
  
  <p>And also when I try to copy an array into another it doesn't work 
  note that I am using </p>
  
  <pre><code>declare -a temp=("${x[@]}")
  </code></pre>
  
  <p>What is wrong with it?</p>