Challenge 3 & 4 (Naufal Reky Ardhana - 4.33.22.0.21)

decision_maker.dart

import 'dart:io';

import 'package:minggu_2/minggu_2.dart' as minggu_2;

void main(List<String> arguments) {
  int? nilai = inputNilai();
  if (nilai != null) {
    print("output menggunakan if else");
    if (nilai >= 91 && nilai <= 100) {
      print('Sangat Baik');
    } else if (nilai >= 81 && nilai <= 90) {
      print('Baik');
    } else if (nilai >= 71 && nilai <= 80) {
      print('Cukup');
    } else if (nilai >= 61 && nilai <= 70) {
      print('Kurang');
    } else if (nilai >= 0 && nilai <= 60) {
      print('Sangat Kurang');
    } else {
      print('Nilai Invalid');
    }
    print("output menggunakan ternary operator");
    nilai >= 91 && nilai <= 100
        ? print('Sangat Baik')
        : nilai >= 81 && nilai <= 90
            ? print('Baik')
            : nilai >= 71 && nilai <= 80
                ? print('Cukup')
                : nilai >= 61 && nilai <= 70
                    ? print('Kurang')
                    : nilai >= 0 && nilai <= 60
                        ? print('Sangat Kurang')
                        : print('Nilai Invalid');
  } else {
    print('Nilai Invalid');
  }
}

int? inputNilai() {
  stdout.write('Masukkan nilai:');
  String? input = stdin.readLineSync();
  if (input != null) {
    int? nilai = int.tryParse(input);
    return nilai;
  } else {
    return null;
  }
}

food_rating.dart

import 'dart:io';

void main(){
  /*
 # A : Sangat Enak
# B : Enak
# C : Cukup
# D : Kurang
# E : Belajar Dulu
# Selain itu : Nilai Invalid
 * */
  String? nilai = inputNilai();
  if (nilai != null) {
    switch (nilai) {
      case 'A':
        print('Sangat Enak');
        break;
      case 'B':
        print('Enak');
        break;
      case 'C':
        print('Cukup');
        break;
      case 'D':
        print('Kurang');
        break;
      case 'E':
        print('Belajar Dulu');
        break;
      default:
        print('Nilai Invalid');
    }
  } else {
    print(nilai);
  }
}

String? inputNilai() {
  stdout.write('Masukkan nilai:');
  String? input = stdin.readLineSync();
  return input;
}

pyramid.dart

import 'dart:io';

void main(){
  print("n=2");
  pyramid(2);
  print("n=5");
  pyramid(5);
}

void pyramid(int n){
  for(int i = 1; i <= n; i++){
    for(int j = 1; j <= i; j++){
      stdout.write("*");
    }
    stdout.write("\n");
  }
}

reverse_pyramid.dart

import 'dart:io';

void reversePyramid(int n){
  for(int i = n; i >= 1; i--){
    for(int j = 1; j <= i; j++){
      stdout.write("*");
    }
    stdout.write("\n");
  }
}

void main(){
  print("n=2");
  reversePyramid(2);
  print("n=5");
  reversePyramid(5);
}