title: Add integers as strings to a variable bash
body: <p>I want to output a string by adding random integer to a variable to create the string. Bash however, just adds the numbers together.</p>
  
  <pre><code>#!/bin/bash
  b=""
  for ((x=1; x&lt;=3; x++))
  do
   number=$RANDOM
   let number%=9
   let b+=$number
  done
  echo ${b}
  </code></pre>
  
  <p>Say every random number is 1, the script will output 3 instead of 111.
  How do I achieve the desired result of 111?</p>