What is an enum in C?

#include <stdio.h>

enum Day { MON, TUE, WED };

int main(void) {
    enum Day d = TUE;
    printf("%d\n", d);
    return 0;
}

Output:

Names make the code easy to read. You can also set values, like enum Level { LOW = 1, HIGH = 10 };. See C enum.

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