Type char
You can use a char variable to store a single character. A character constant is formed by enclosing the character within a pair of single quotation marks. So 'a', ';', and '0' are all valid examples of character constants. The first constant represents the letter a, the second is a semicolon, and the third is the character zero—which is not the same as the number zero. Do not confuse a character constant, which is a single character enclosed in single quotes, with a C-style character string, which is any number of characters enclosed in double quotes. As mentioned in the last chapter, a string of characters enclosed in a pair of double quotes that is preceded by an @ character is an NSString character string object.
The character constant ...
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