title: Trying to calculate radius and area of circle in BASH
body: <p>I'm trying to write a basic script to calculate the radius and area of a circle, where PI=3.14, and the circumference is given. I am very very new to scripting, and I can't seem to figure this out.</p>
  
  <pre><code>#!/bin/bash
  PI=3.14
  CIRC=5
  RAD=echo "((CIRC/2*PI))" | bc-l
  printf "Radius: %.2f" $RAD
  AREA=echo "((PI*RAD**2))" | bc-l
  printf "Area: %.2f" $AREA
  </code></pre>
  
  <p>The sum of both equations are not being stored in those variables, and I have no idea why. I hope someone can help explain.</p>