What is the Big O notation for Rehashing in C?

The Big O notation for rehashing in C, particularly when used in hash tables, is O(n), where n is the number of elements in the hash table. This complexity arises because rehashing involves iterating through all existing elements to redistribute them into a newly sized table. However, it's important to note that the amortized time complexity for insertions, including rehashing, remains O(1) under typical conditions, as rehashing occurs infrequently relative to the number of insertions.