how to change a value from an array c++

To change a value in an array in C++, you need to follow these steps:

1. Identify the index of the element you want to change: Each element in an array has an index, which represents its position in the array. The index starts from 0 for the first element and increments by 1 for each subsequent element.

2. Access the element using its index: To change the value of an element in the array, you need to access it using square brackets [] notation. Provide the index inside the brackets to access the element at that index.

3. Assign a new value to the element: Once you have accessed the element, you can assign a new value to it using the assignment operator (=).

Here's an example to illustrate the process:

#include <iostream>

int main() {
    int arr[5] = {1, 2, 3, 4, 5}; // Example array with 5 elements

    // Changing the value of the third element (index 2) to 10
    arr[2] = 10;

    // Printing the updated array
    for (int i = 0; i < 5; i++) {
        std::cout << arr[i] << " ";
    }
    std::cout << std::endl;

    return 0;
}

In this example, we have an array arr with 5 elements. We change the value of the third element (index 2) to 10 by assigning the new value using arr[2] = 10;. Finally, we print the updated array using a loop.

The output of this program will be: 1 2 10 4 5, indicating that the value at index 2 has been successfully changed to 10.