string_upper_lower_package #

The string_upper_lower_package is a Dart package that provides a utility function to invert the case of each character in a given string. This package can be particularly useful for text manipulation tasks where you need to toggle the case of each character in a string from upper to lower or vice versa.

Features #

• Convert all uppercase characters in a string to lowercase.
• Convert all lowercase characters in a string to uppercase.
• Preserve non-alphabetic characters (e.g., numbers, punctuation) unchanged.

Installation #

Add the following dependency to your pubspec.yaml file:

dependencies:
  string_upper_lower_package: ^1.0.0