How to Insert an Item at Specific Index in a Vector in C++ - Step by Step Examples

How to Insert an Item at Specific Index in a Vector in C++ ?

Answer

To insert an item at a specific index in a Vector in C++, you can use the insert() method. This method inserts elements into the Vector at the specified position.

✐ Examples

1 Insert an Integer at Specific Index in a Vector

In this example,

Create a Vector of integers.
Declare an integer variable to insert into the Vector.
Use the insert() method to insert the integer at the desired index.
After insertion, you can verify the contents of the Vector.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> numbers = {1, 2, 3, 4, 5};
    int newNumber = 10;
    int index = 2; // Index to insert
    numbers.insert(numbers.begin() + index, newNumber);
    for (int num : numbers) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 10 3 4 5

2 Insert a String at Specific Index in a Vector

In this example,

Create a Vector of strings.
Declare a string variable to insert into the Vector.
Use the insert() method to insert the string at the desired index.
After insertion, you can verify the contents of the Vector.

C++ Program

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

int main() {
    std::vector<std::string> words = {"apple", "banana", "orange"};
    std::string newWord = "grape";
    int index = 1; // Index to insert
    words.insert(words.begin() + index, newWord);
    for (const std::string& word : words) {
        std::cout << word << " ";
    }
    return 0;
}

Output

apple grape banana orange

Summary

In this tutorial, we learned How to Insert an Item at Specific Index in a Vector in C++ language with well detailed examples.

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How to Insert an Item at Specific Index in a Vector in C++ - Step by Step Examples

How to Insert an Item at Specific Index in a Vector in C++ ?

Answer

✐ Examples

1 Insert an Integer at Specific Index in a Vector

C++ Program

Output

2 Insert a String at Specific Index in a Vector

C++ Program

Output

Summary

More C++ Vectors Tutorials