Getting the author name on author archive page

I don’t know what are you trying to do with if-else statement, but to display author name with their published post link use this code:

<span>Article posted by <?php the_author_posts_link(); ?></span>

Tweak it according to your need.
One more thing: You need to call the_author_posts_link() function within the while loop (Yes, the same while loop, which is used to print the_title and the_content).

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