 <p>This is known as function calling..</p> <p>like you call function in other programing language like in java or c#:</p> <pre><code>ob.method() // where ob is object and method is the function name.. </code></pre> <p>similarly if you want to call a function in objective c the syntax is calling function is like this : </p> <pre><code> [ob method]; </code></pre>