4.1 Arrays and Indexes

An array stores values of the same type. C array indexes start at 0.

int scores[5] = {88, 91, 76, 95, 83};

printf("%d\n", scores[0]);
printf("%d\n", scores[4]);

An array of length 5 has valid indexes from 0 through 4. C does not automatically protect against out-of-bounds access, so scores[5] is dangerous.

Arrays are often processed with loops:

for (int i = 0; i < 5; i++) {
    printf("%d\n", scores[i]);
}