title: Shell script variable value
body: <p>I have value 0.000000 written in a file. I open the file and assign it to a variable.
  But when i compare it's value like <code>if [ "$var" -eq "0.000000" ]</code> it doesn't evaluate to true.
  What could be the reason?</p>
  
  <p>Moreover, if the file has just 0, and if i compare it's value <code>[ "$var" -eq "0" ]</code> it evaluates as expected to true.</p>