Understanding define function with Scrabble lab

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I fail to understand define command while taking a look at template code provided that does not have mention of define command. Since there is no TODO after #include, I guess define command is not needed or at least not mandatory.

A similar problem with input of months has define command:

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#include <stdio.h>
#define MONTHS 12
int main(void)
{
int days[MONTHS] = {31,28,31,30,31,30,31,31,30,31,30,31};
int index;
for (index = 0; index < MONTHS; index++)
printf("Month %d has %2d days.\n", index +1,
days[index]);
return 0;
}

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Is it desirable to mention define with POINTS? Or it is wrong for this problem:

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#include <stdio.h>
#include <cs50.h>
#include <ctype.h>
#include <string.h>
#define POINTS 26

// Points assigned to each letter of the alphabet
int POINTS[] = {1, 3, 3, 2, 1, 4, 2, 4, 1, 8, 5, 1, 3, 1, 1, 3, 10, 1, 1, 1, 1, 4, 4, 8, 4, 10};

int compute_score(string word);

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https://edstem.org/us/courses/176/discussion/842067?answer=1929475[learn_press_profile]

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