WooCommerce order step values

gistfile1.txt

/**
 * @description   Minimum, maximum, incremental and start quantity for products | WooCommerce
 * @author        Fabio Tielen / Code Agency / https://codeagency.be
 * @testedwith    WooCommerce 3.3
 */
 
add_filter( 'woocommerce_quantity_input_args', 'ca_woocommerce_quantity_increment_changes', 10, 2 );
function ca_woocommerce_quantity_increment_changes( $args, $product ) {

   if ( is_singular( 'product' ) ) {
   $args['input_value'] = 20; // Start quantity for the product (default = 1) 
   $args['max_value'] = 200; // Maximum quantity that can be added to cart (default = n/a)
   $args['min_value'] = 2; // Minimum quantity that can be added to cart (default = 1)
   $args['step'] = 2; // Step value Increment or decrement by this quantity (default = 1)
   return $args;
   }
}