C++ Arrays

An array in C++ is a collection of elements of the same data type stored in contiguous memory locations. Arrays allow you to store multiple values using a single variable name and access each element using an index.

Syntax

data_type array_name[array_size];

Where:

Array indices start at 0, not 1.
All elements in an array must be of the same data type.
The size of the array must be known at compile time (for standard arrays).
Access elements using the syntax: array_name[index].

Next Topic

Next, learn about Multidimensional Arrays in C++.

data_type – Type of elements stored in the array (e.g., int, float, char).
array_name – Name of the array.
array_size – Number of elements the array can hold (must be a constant value).

Example: Declaring and Initializing an Array

#include <iostream>
using namespace std;

int main() {

    int numbers[5] = {10, 20, 30, 40, 50}; // Array initialization

    // Accessing array elements
    for(int i = 0; i < 5; i++) {
        cout << "Element " << i << ": " << numbers[i] << endl;
    }

    return 0;
}

Output

Element 0: 10
Element 1: 20
Element 2: 30
Element 3: 40
Element 4: 50

Key Points About Arrays

Array indices start at 0, not 1.
All elements in an array must be of the same data type.
The size of the array must be known at compile time (for standard arrays).
Access elements using the syntax: array_name[index].

Next Topic

Next, learn about Multidimensional Arrays in C++.