public IActionResult Area([FromBody] AreaModel data) { //CONVERT TO DOUBLE var length = Convert.ToDouble(data.Length); var breath = Convert.ToDouble(data.Breath); if (length.GetType() != typeof(double) || breath.GetType() != typeof(double)) { response.Status = "Fail"; response.Description = "Please input a number"; return(BadRequest(response)); } else { response.Status = "Success"; response.Description = "Calculated Area"; response.Data = Math.Round(Calculation.AreaCalc(length, breath), 2); return(Ok(response)); } }