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• The type of each element of a string literal.
• Used for character data from a limited character set (where signedness has little meaning) as opposed to integer data.

int

• Used for data that could can be either EOF (a negative value) or character data interpreted as unsigned char and then converted to int. As a result, returned by fgetc(), getc(), getchar(), and ungetc(). Also, accepted by the character handling functions from <ctype.h>, because they might be passed the result of fgetc(), etc.
• The type of a character constant. Its value is that of a plain char converted to int.

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