Remove Zero Decimals from WooCommerce: Remove decimal portion of WooCommerce price if it is zero. https://www.damiencarbery.com/2019/04/remove-zero-decimals-from-wooCommerce/

wc-remove-zero-decimals.php

<?php
/*
Plugin Name: Remove Zero Decimals from WooCommerce
Plugin URI: Plugin URI:  https://www.damiencarbery.com/
Description: Remove decimal portion of WooCommerce price if it is zero.
Author: Damien Carbery
Author URI: https://www.damiencarbery.com
Version: 0.1
*/


add_filter( 'formatted_woocommerce_price', 'dcwd_remove_zero_decimals', 10, 5 );
function dcwd_remove_zero_decimals( $formatted_price, $price, $decimal_places, $decimal_separator, $thousand_separator ) {
/*
	// Leave decimals in on single product page.
	if ( is_product() ) {
		return $formatted_price;
	}
*/

	if ( $price - intval( $price ) == 0 ) {
		// Format units, including thousands separator if necessary.
		return $unit = number_format( intval( $price ), 0, $decimal_separator, $thousand_separator );
	}
	else {
		return $formatted_price;
	}
}