floor function

int? floor(dynamic value)

Returns the largest integer less than or equal to value.

• Accepts int, double, or String.
• Strings are parsed via parseDouble before applying .floor().
• Returns null if value is null.
• Throws Exception if value is not a supported type.

Example:

floor(3.9);     // -> 3
floor("7.1");   // -> 7

Implementation

int? floor(dynamic value) {
  if (value == null) return null;
  if (value is int) return value;
  if (value is double) return value.floor();
  if (value is String) return parseDouble(value)?.floor();
  throw Exception("Invalid value '$value' for 'floor' function.");
}