what is the use of plus sign in a given code below? : <p>I am a beginner in programming and have been seeing plus signs like +sum, +result, but not sure what is the use of it.
could anyone put some light on this issue for me.</p>

<pre><code>    SimpleIO.println("Enter gear: ");
    gear = SimpleIO.readInteger();
    SimpleIO.println("Enter power: ");
    power = SimpleIO.readInteger();
    System.out.println("speed= " +power*gear);`
</code></pre>

<p>thanks in advance :)</p>
