Char in c

[0]
A char in the C programming language is a data type with the size of exactly 
one byte,[6] which in turn is defined to be large enough to contain any member
of the “basic execution character set”. The exact number of bits can be checked
via CHAR_BIT macro. 

[1]
C uses char type to store characters and letters. However, the char type is 
integer type because underneath C stores integer numbers instead of characters.
In C, char values are stored in 1 byte in memory,and value range from -128 to 
127 or 0 to 255.

Char in c

int main(int argc, char *argv[])
{
    char lettre = 'A';

    printf("%c\n", lettre);

    return 0;
}

-1

Source: openclassrooms.com

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