What is the difference between Static and Dynamic arrays in C++?

1. Lifecycle and Storage Location:

• Static arrays: Their size is determined at compile time and persists throughout the entire runtime of the program. They are typically stored on the stack, meaning the size must be known at compile time and cannot be dynamically adjusted based on runtime requirements. For example:

  cpp
  int arr[10];  // Size determined at compile time

• Dynamic arrays: Their size is determined at runtime and can be created and destroyed as needed. They are typically stored on the heap, allowing their size to be dynamically adjusted during execution. For example:

  cpp
  int* arr = new int[10]; // Allocate space for 10 integers at runtime

1. Size Adjustment:

• Static arrays: Once initialized, their size is fixed and cannot be increased or decreased.
• Dynamic arrays: Can be reallocated to a new size. This typically involves creating a larger array, copying the contents from the old array, and then deallocating the old array. For example, a code snippet for resizing an array might be:

  cpp
  int* resizeArray(int* arr, int currentSize, int newSize) {
      int* newArr = new int[newSize];
      for (int i = 0; i < currentSize; i++) {
          newArr[i] = arr[i];
      }
      delete[] arr;
      return newArr;
  }

1. Performance Considerations:

• Static arrays: Due to their fixed size and stack storage, access speed is typically faster than heap-based arrays.
• Dynamic arrays: While offering flexibility, heap allocation and potential reallocations introduce additional overhead and complexity.

1. Use Cases:

• Use static arrays when you know the maximum data size and it remains constant.
• Use dynamic arrays when you need to adjust the size based on runtime data or when the dataset exceeds stack capacity limits.

In summary, choosing between static and dynamic arrays depends on the specific program requirements, considering factors such as performance, memory management, and overall complexity.