Show the Value in Array

To show or display the values stored in an array, you can typically use a loop to iterate through the array and print each element.

C/C++

int arr[] = {1, 2, 3, 4, 5};
int size = sizeof(arr) / sizeof(arr[0]);

for (int i = 0; i < size; ++i) {
    // using c
    printf("Element at index %d: %d\n", i, arr[i]);

    // using c++
    cout << "Element at index " << i << ": " << arr[i] << endl;

}

• sizeof(arr) returns the total size (in bytes) occupied by the array arr.
• sizeof(arr[0]) returns the size (in bytes) of the first element of the array arr.

By dividing the total size of the array arr by the size of its first element (arr[0]), it calculates the number of elements in the array. This method is used to determine the size of the array regardless of the number of elements explicitly defined during initialization.

Java

int[] arr = {1, 2, 3, 4, 5};

for (int i = 0; i < arr.length; ++i) {
    System.out.println("Element at index " + i + ": " + arr[i]);
}

In Java, arrays have a property called .length that directly provides the size or length of the array. This property simplifies the process of determining the number of elements in an array compared to languages like C or C++, where you'd need to calculate the size using methods like sizeof.

Python

arr = [1, 2, 3, 4, 5]

for i in range(len(arr)):
    print("Element at index {}: {}".format(i, arr[i]))

In Python, we use a list (arr) instead of an array. The range(len(arr)) generates a sequence of indices corresponding to the length of the list, and the for loop iterates over these indices.

• len is a built-in function that returns the length (number of elements) of an object, such as a string, list, or tuple.