Letter case conversion

The letter case conversion tool can convert all input English letters into uppercase or lowercase letters

1. PHP: strtolower ($str) string is converted to lower case, and strtoupper ($str) string is converted to upper case; Ucfirst ($str) converts the first character to uppercase, and ucwords ($str) converts the first letter of each word to uppercase.
2. JavaScript: toLowerCase() returns a string in which all alphabetic characters are converted to lowercase; ToUpperCase () returns a string in which all alphabetic characters are converted to uppercase.
3. Python: capitalize() changes the first letter of the string to uppercase, and other letters to lowercase; The upper() method converts lowercase letters in the string to uppercase letters; The lower() method converts all uppercase characters in the string to lowercase characters; The title () method returns a "captioned" string, which means that all words start with uppercase and the rest of letters are lowercase.
4. ASP: LCase (s) from uppercase to lowercase, UCase (s) from lowercase to uppercase.