Counter with Persistent Storage - Dart Typing CST Test

Counter with Persistent Storage — Dart Code

Stores counter value in a file to persist between program runs (console app).

import 'dart:io';

void main() {
	File file = File('counter.txt');
	int count = 0;
	if(file.existsSync()) {
		count = int.parse(file.readAsStringSync());
	}

	void updateUI() {
		print('Counter: $count');
		file.writeAsStringSync(count.toString());
	}

	void increment() { count++; updateUI(); }
	void decrement() { count--; updateUI(); }
	void reset() { count = 0; updateUI(); }

	updateUI();
	increment();
	decrement();
	reset();
}

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