Control flow statements in Dart

control-flow.dart

import 'dart:io';

void main() {
  // Read some text from console
  var password = stdin.readLineSync();

  // Check if password is correct
  if (password == 'abc') {
    print('Access granted');
  } else if (password == 'xyz') {
    print('Some access granted');
  } else {
    print('Go away');
  }
  
  // Greet every user personally
  var users = ['Bob', 'John', 'Steve'];
  for (var user in users) {
    print('Hello, ' + user);
  }
  
  // Print out squares of numbers from 0 to 4
  for (int i = 0; i < 5; i++) {
    print(i * i);
  }
  
  // Print out powers of 2 less than 10
  var j = 1;
  while (j < 10) {
    print(j);
    j *= 2;
  }
}