test shortcode

// Add Shortcode
function test( $atts ) {

	// Attributes
	$atts = shortcode_atts(
		array(
			'var_a' => '12',
			'var_b' => '42',
		),
		$atts,
		'test'
	);

	vars = var_a . " + " . var_b;
	return vars;

}
add_shortcode( 'test', 'test' );