input.html.erb

rom", "From" %>
    <%= number_field_tag('from', 0, class: "form-control", min: 0, max: 999999, required: true) %>
    <%= label_tag "to", "To" %>
    <%= number_field_tag('to', 999999, class: "form-control", min: 0, max: 999999, required: true) %>
    <div class="btn-group" role="group">
        <%= submit_tag("Calculate Lucky Numbers!", class: "btn btn-primary", id: "submit-btn") %>
        <input type="button" value="Clear" class="btn btn-secondary" id="clear-btn">
    </div>
<% end %>