Check out example codes for "djb2 algorithm for C". It will help you in understanding the concepts better.

Code Example 1

// Djb2 hash function - really good and implementable code
unsigned long hash(char *str) {

        unsigned long hash = 5381;
        int c;
        while ((c = *str++))
            hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
        return hash % NUM_BUCKETS;

}

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