Enter logic for Quadratic hashing

data_structures/hashing/quadratic_probing.py

@@ -1,5 +1,25 @@
 #!/usr/bin/env python3
-
+"""
+Hashing is a technique that  uses a hash function that converts a given  number
+or any other key to a smaller number and uses the small number as the index in a table called a hash table.
+
+Hash Function:
+A function that converts a given big number to a small practical integer value.
+The mapped integer value is used as an index in the hash table.
+
+Quadratic Probing:
+Quadratic probing is an open-addressing scheme where we look for the i^2th slot in the i’th iteration
+if the given hash value x collides in the hash table.
+
+The logic is
+
+For the loop of the array, running from 0 to array length, given x is an element of the array
+1 - Check if the slot hash(x) % SizeofHashtable is full, then we try (hash(x) + 1*1) % SizeofHashtable.
+2 - then check if (hash(x) + 1*1) % SizeofHashtable is also full, then we try (hash(x) + 2*2) % SizeofHashtable.
+3 - then check If (hash(x) + 2*2) % SizeofHashtable is also full, then we try (hash(x) + 3*3) % SizeofHashtable.
+...
+This process is repeated for all the values of i until an empty slot is found.
+"""
 from .hash_table import HashTable