display category name wordpress

117

how to get display name in wordpress -

<?php 
	$user_info = get_userdata(1);
	echo 'Username: ' . $user_info->user_login . "\n";
	echo 'User roles: ' . implode(', ', $user_info->roles) . "\n";
	echo 'User ID: ' . $user_info->ID . "\n";
?>

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