What is the time complexity of accessing an element in an array?

Accessing an element in an array has a time complexity of O(1), which signifies constant time complexity. This means that the time it takes to access any element in an array remains the same regardless of the size of the array.

When you want to access an element at a specific index, such as index i, the operation involves calculating the memory address of that index based on the base address of the array and the size of each element. This calculation is straightforward and involves only a few arithmetic operations, leading to a fixed time for the access operation.

This characteristic is one of the primary strengths of arrays, making them highly efficient for scenarios where quick access to elements is necessary. In contrast, the other time complexities mentioned relate to other data structures or operations that do not support this level of immediacy when accessing elements.