Practical 1. Features of dart language

//1A. Program to demonstrate the features of Dart language.

void main() {
  int num1 = 10;

  double num2 = 10.1;
  bool num3 = true;

  String str1 = 'Hello Jagdish!\n';

  print(num1);
  print(num2);
  print(num3);
  print(str1);
}

//1B.Different Types of operators
void main() {
  int a = 2;
  int b = 3;

  var c = a + b;
  print("Summ of a and b : $c");

  var d = a - b;
  print("Difference of a and b : $d");

  var e = -d;
  print("The negation of difference between a and b : $e");

  var f = a * b;
  print("Product of a and b : $f");

  var g = b / a;
  print("Quotient of b and a : $g");

  var h = b ~/ a;
  print("Quotient of a and b (integer division) : $h");

  var i = b % a;
  print("Remainder of b divided by a : $i");
}

//1C. Decision making operators?
void main() {
  var marks = 74;
  if (marks >= 85) {
    print("Excellent!\n");
  } else if (marks >= 75) {
    print("Good!\n");
  } else if (marks >= 65) {
    print("Better!\n");
  } else {
    print("Average!\n");
  }
}

//1D.Factorial Function
void main() {
  print(factorial(6));
}

factorial(number) {
  if (number <= 0) {
    return 1;
  } else {
    return number * factorial(number - 1);
  }
}

//1E.Defining class
class Student {
  var stdName;
  var stdAge;
  var stdRoll_no;

  showStdInfo() {
    print("Student Name is : ${stdName}");
    print("Student Age is : ${stdAge}");
    print("Student Roll No is : ${stdRoll_no}");
  }
}

void main() {
  var std = new Student();
  std.stdName = "Jagdish!";
  std.stdAge = 20;
  std.stdRoll_no = 242551;
  std.showStdInfo();
}