C++ Arrays Declaration - Access - Loop

In programing languages Arrays are used to store multiple values in one variable rather than creating multiple variables. In C++ we declare an array using braces and length of array between braces. Example fruits[4]

C++ example of declaring an array

#include <iostream>

#include <string>

using namespace std;

int main() {
  string fruits[4] = {"Banana", "Apple", "Orange", "Strawberry"};
  return 0;
}

C++ Access an element in an Array

In C++ we access an element in an array by using the index of that element between braces. See below example cout << fruits[0];:

#include <iostream>

#include <string>

using namespace std;

int main() {
  string fruits[4] = {"Banana", "Apple", "Orange", "Strawberry"};
  cout <<"Accessing first element of the array: " << fruits[0];
  return 0;
}

Output

Accessing first element of the array: Banana

C++ Change an element in an Array

In C++ we change an element in an array by using the index of that element between braces. See below example fruits[0] = "Blueberry";:

#include <iostream>

#include <string>

using namespace std;

int main() {
  string fruits[4] = {"Banana", "Apple", "Orange", "Strawberry"};
  fruits[0] = "Blueberry";
  cout <<"Accessing first element of the array: " << fruits[0];
  return 0;
}

Output

Accessing first element of the array: Blueberry

C++ Loop through Array elements

#include <iostream>
#include <string>
using namespace std;

int main() {
  string fruits[4] = {"Banana", "Apple", "Orange", "Strawberry"};
  for(int i = 0; i < 4; i++) {
    cout << fruits[i] << "\n";
  }
  return 0;
}

Output

Banana
Apple
Orange
Strawberry

Conclusion

In this page (written and validated by A. Gawali) you learned about C++ Arrays Declaration - Access - Loop . What's Next? If you are interested in completing Cpp tutorial, your next topic will be learning about: Cpp Create a function.

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