title: Bitwise Operations -- Arithmetic Operations
body: <p>Can you please explain the below lines, with some good examples. </p>
  
  <blockquote>
    <p>A left arithmetic shift by n is
    equivalent to multiplying by 2<sup>n</sup>
    (provided the value does not
    overflow).</p>
  </blockquote>
  
  <p>And:</p>
  
  <blockquote>
    <p>A right arithmetic
    shift by n of a two's complement value
    is equivalent to dividing by 2<sup>n</sup> and
    rounding toward negative infinity. If
    the binary number is treated as ones'
    complement, then the same right-shift
    operation results in division by 2<sup>n</sup>
    and rounding toward zero.</p>
  </blockquote>