No particular reason. It is simply a convention with no rationale.
Chat with our AI personalities
Yes upper and lower case letters can simultaneously be used as password features.
THESE LETTERS ARE IN UPPERCASE. these letters are in lowercase. These Letters Are in Upper and Lower Case.
Roman numerals appear both in upper case and lower case. The introductory pages of books are often numbered in lower case Roman numerals.
The acceptable convention says uppercase letters are used for sets and matrices and lowercase letters are for variables, constants and vectors. Greek letters are mainly used for constants, such as pi=3.14 and e=2.718.
The latin alphabet for English has 52 letters, if you count both upper case and lower case. Otherwise, there no other alphabet with 52 letters.