Char

A char can be define as follows:

#include <stdio.h>


int main() {
    char test = 'a';
    return 0;
}

Note: in here we have to use single quote '

A char can be increment by value like so:

#include <stdio.h>


int main() {
    char test = 'a';

    putchar(test++);
    putchar(test++);
    putchar(test++);
    putchar(test++);
    putchar(test++);
    putchar(test++);
    putchar(test++);
    putchar(test++);

    return 0;
}

abcdefgh

Compare to an int

Note that a char can also be compared to an int

#include <stdio.h>


int main() {
  printf("%d\n", 'a' - 91);
  return 0;
}

6

Since a is 97 when convert to int.

This will also hold true as well:

#include <stdio.h>


int main() {
  printf("%d\n", 'a' == 97);
  return 0;
}

1