How to declare symbolic constant in C?

#include <stdio.h>
    #define PI 5.2676
    #define MAXSIZE 100
    #define MESSAGE "Hello World"
    
    int main() {
        float circumference = 2 * PI * 5;
        printf("Circumference: %f\n", circumference);
        printf("Max size: %d\n", MAXSIZE);
        printf("%s\n", MESSAGE);
        return 0;
    }
    

Circumference: 52.675999
    Max size: 100
    Hello World