calculator_brain.dart

import 'dart:math';

class CalculatorBrain {
  CalculatorBrain({this.height, this.weight});
  final int? height, weight;
  double? _bmi;
  String calculateBMI() {
    _bmi = weight! / pow(height! / 100, 2);
    return _bmi!.toStringAsFixed(1);
  }

  String getResult() {
    if (_bmi! >= 25) {
      return 'overweight';
    } else if (_bmi! > 18.5) {
      return 'normal';
    } else {
      return 'underweight';
    }
  }

  String getInterpretation() {
    if (_bmi! >= 25) {
      return 'You have a higher than normal body weight. Try to exercise more.';
    } else if (_bmi! > 18.5) {
      return 'You have a normal body weight. Good job!';
    } else {
      return 'you have a lower than normal body weight. You can eat a bit more.';
    }
  }
}