On the single post page for our posts, we wanted to display the excerpt only if one had been entered. Since the built-in WordPress function to get the excerpt for a post will automatically generate one for you, we couldn’t just put the function in our post loop like what was done below.

	
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Doing this causes the intro of the post to show twice, once from the auto-generated excerpt and once in the post content. To fix this, we added a quick check to the post loop. Simply replacing the_excerpt function in the post loop with this little piece of code removed the double intro.

post_excerpt) ) {
		//We have a excerpt so print it
		the_excerpt();
	} 
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