List, Enums & Control Statements - Introduction to dart

main.dart

void main() {
  int score1 = 36;
  int score2 = 85;
  int score3 = 66;
  int score4 = 73;
  int total = score1 + score2 + score3 + score4;
  var average = total / 4;
  print("the average score is: $average");
  
  //control statement
  if(score4>average){
    print("$score4 is greater than average");
  }
  else {
    print('$score4 is below average');
  }
  print(scoreGrade(60));
  printGrade(scoreGrade(score4));
  printGrade("Banana");
  
  //enums
  print(scoreEnumGrade(60));
  printEnumGrade(scoreEnumGrade(score4));
  printEnumGrade(Grade.Fail);
  
  showAverage("CSC101", score1, score2, score3, score4);
  //increasing number of scores issue
  
  
  //List
  List<int> scores = [45, 85, 56, 73];
  print(scores[0]);
  print(scores[1]);
  print(scores[2]);
  print(scores[3]);
  print(scores.length);
  
  //a control flow statement
  for(int i = 0; i < scores.length; i++){
    print("Item $i is ${scores[i]}");
  }
  showAverageScores("CSC201", scores);
}

String scoreGrade(int score){
  //control statements
  if(score >= 70) return 'Excellent';
  else if(score >= 60) return 'Good';
  else if(score >= 50) return 'Average';
  else if(score >= 40) return 'Pass';
  else return 'Fail';
}

void printGrade(String grade){
  print("your grade is $grade");
}


enum Grade { Excellent, Good, Average, Pass, Fail }


Grade scoreEnumGrade(int score){
  if(score >= 70) return Grade.Excellent;
  else if(score >= 60) return Grade.Good;
  else if(score >= 50) return Grade.Average;
  else if(score >= 45) return Grade.Pass;
  else return Grade.Fail;
}

void printEnumGrade(Grade grade){
  print("your grade is $grade");
}


void showAverage(
    String subject, int score1, int score2, int score3, int score4) {
  int total = score1 + score2 + score3 + score4;
  var average = total / 4;
  print("$average is the average score in $subject");
}

void showAverageScores(String subject, List<int> scores){
  int total = 0;
  for(var score in scores){
    total = total + score;
  }
  var average = total / 4;
  print("$average is the average list score in $subject");
}