dart - Dart 中的操作 % 返回一个奇怪的值 % 在 Dart 中工作

Question

var c 返回 3 但 10/7=1.4285，其余为 0.4285，operator % 有错误？

void main() {
  var a = 10;
  var b = 7;
  var c;
  c = a % b;
  print(c);
}

Answer 1

来自 % 的文档num 上的接线员在 Dart 中:

Euclidean modulo operator.

Returns the remainder of the Euclidean division. The Euclidean division of two integers a and b yields two integers q and r such that a == b * q + r and 0 <= r < b.abs().

The Euclidean division is only defined for integers, but can be easily extended to work with doubles. In that case r may have a non-integer value, but it still verifies 0 <= r < |b|.

The sign of the returned value r is always positive.

See remainder for the remainder of the truncating division.

https://api.dart.dev/stable/2.8.4/dart-core/num/operator_modulo.html