How to Iterate Over a Vector in C++

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How to Iterate Over a Vector in C++ ?

Answer

To iterate over a vector in C++, you can use a for loop to access each element of the vector one by one.

✐ Examples

1 Iterate Over a Vector of Integers

In this example,

First, we include the necessary header file and to use the std::vector class and input/output stream.
We create a vector named vec and initialize it with a series of integer values using the std::vector class.
We then use a for loop to iterate over each element of the vector. The loop variable item will take on the value of each element in the vector, one at a time.
Inside the loop, we use std::cout to print the current value of the loop variable item.
The std::cout statement sends the value of item to the console, allowing us to see each element of the vector as it is processed.

C++ Program

#include <vector>
#include <iostream>

int main() {
    std::vector<int> vec = {10, 20, 30, 40, 50};
    for (int item : vec) {
        std::cout << item << std::endl;
    }
    return 0;
}

Output

2 Iterate Over a Vector of Strings

In this example,

First, we include the necessary header file , , and to use the std::vector and std::string classes and input/output stream.
We create a vector named vec and initialize it with a series of string values using the std::vector class.
We then use a for loop to iterate over each element of the vector. The loop variable item will take on the value of each element in the vector, one at a time.
Inside the loop, we use std::cout to print the current value of the loop variable item.
The std::cout statement sends the value of item to the console, allowing us to see each element of the vector as it is processed.

C++ Program

#include <vector>
#include <iostream>
#include <string>

int main() {
    std::vector<std::string> vec = {"apple", "banana", "cherry", "date", "elderberry"};
    for (const std::string& item : vec) {
        std::cout << item << std::endl;
    }
    return 0;
}

Output

apple
banana
cherry
date
elderberry

Summary

In this tutorial, we learned How to Iterate Over a Vector in C++ language with well detailed examples.

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How to Iterate Over a Vector in C++

How to Iterate Over a Vector in C++ ?

Answer

✐ Examples

1 Iterate Over a Vector of Integers

C++ Program

Output

2 Iterate Over a Vector of Strings

C++ Program

Output

Summary

More C++ Vectors Tutorials