ssjs-lookup-rows-loop.html

<script runat="server">
Platform.Load("core","1");
var custId = "0031t000005D98UAAS"

var OrdersDE = DataExtension.Init("Orders");
var rows = OrdersDE.Rows.Lookup(["CustomerId"], [custId]);

if(rows.length >= 1) {
      for (i = 0; i < rows.length; i++) {
        OrderItem = rows[i]["OrderItem"];
        Write("&#8226; OrderItem " + i + ":" + OrderItem + "<br>");
    }
}
</script>