task1

import 'dart:io';
import 'dart:math';

void main() {
  print("Task 1: ");
  print("Please enter R value to calculate circumference: ");
  num? number = num.parse(stdin.readLineSync()!);
  num pie = 3.14159;
  num rsq = pow(number, 2);
  num circ = pie * rsq;
  print("Circle circumference would be $circ");
  print("\n---------------\n");
  }