isStringNumber function

bool isStringNumber(
  1. String str
)

Returns true if str represents a valid number, false otherwise.

This function attempts to parse the input string as a double using the double.tryParse method. If the conversion succeeds, the function returns true. Otherwise, it returns false.

Implementation

bool isStringNumber(String str) {
  final doubleValue = double.tryParse(str);

  return doubleValue != null;
}