subtract static method

double subtract(
  1. num? a,
  2. num? b
)

减 (精确相减,防止精度丢失).

a如果值为null默认当作0处理

b如果值为null默认当作0处理

Implementation

static double subtract(num? a, num? b) {
  return subtractDec(a, b).toDouble();
}