DateTime Difference and Duration

Calling end.difference(start) compares two DateTime values and returns a Duration. From there, inMinutes gives the total minutes, and integer division and modulo split that into hours and leftover minutes.

Program

Play the program to compute the elapsed time between 09:05 and 10:45 UTC.

duration_difference.dart

void main() {
  var start = DateTime.utc(2024, 7, 4, 9, 5);
  var end = DateTime.utc(2024, 7, 4, 10, 45);
  var elapsed = end.difference(start);
  var totalMinutes = elapsed.inMinutes;
  var hours = totalMinutes ~/ 60;
  var minutes = totalMinutes % 60;
  print('elapsed=${hours}h ${minutes}m');
}

difference `end.difference(start)` returns a `Duration` between two `DateTime` values; here, 100 minutes.

inMinutes `Duration.inMinutes` exposes the total whole minutes, ignoring sub-minute resolution.

split with ~/ and % `totalMinutes ~/ 60` is the hour count and `totalMinutes % 60` is the leftover minutes.