How to show category name by category id in wordpress

Here is will show you some way to get category name and link from category ID

/// Category link  from category Name

<?php
    // Get the ID of a given category
    $category_id = get_cat_ID( 'Category Name' );

    // Get the URL of this category
    $category_link = get_category_link( $category_id );
?>

<!-- Print a link to this category -->
<a href="<?php echo esc_url( $category_link ); ?>" title="Category Name">Category Name</a>


WordPress – Get Category Link By Category Id

<?php
echo get_category_link( "category_id_here" );
?>

WordPress – Get Category name By Category Id

<?php echo get_the_category_by_id(10); ?>

Yellow color color code some shows a error "Catchable fatal error: Object of class stdClass could not be converted to string in ..."

if showing Catchable fatal error:  then use bellow for category name 

<?php
$cat=1;
$yourcat = get_category($cat);
if ($yourcat) {
echo '<h2>' . $yourcat->name . '</h2>';
}
?>