Uppercase vs Lowercase

Uppercase letters are the capital versions of alphabetic characters (A, B, C), often used at the beginning of sentences, proper nouns, or for emphasis. Lowercase letters are their smaller counterparts (a, b, c), used in most regular writing within sentences. The main difference is size and visual impact, helping readers quickly identify sentence starts, names, or important words. Using uppercase and lowercase correctly improves clarity and readability in written communication.