How to check if a Specific Element is present in the List in C++

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How to check if a Specific Element is present in the List in C++ ?

Answer

To check if a specific element is present in a list in C++, you can use the find function of the std::list container.

✐ Examples

1 Check Element Presence in List (Integer)

In this example,

We create a list named myList with some elements.
We use the find function to check if the specified element is present in the list.
The find function returns an iterator to the element if found, otherwise it returns an iterator to the end of the list.
We check if the iterator is not equal to the end iterator to determine if the element is present.
Finally, we print the result to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<int> myList = {10, 20, 30, 40, 50};
    int searchElement = 40;
    auto it = std::find(myList.begin(), myList.end(), searchElement);
    bool isPresent = it != myList.end();
    std::cout << "Element presence in list: " << std::boolalpha << isPresent << std::endl;
    return 0;
}

Output

Element presence in list: true

2 Check Element Presence in List (String)

In this example,

We create a list named myList with some string elements.
We use the find function to check if the specified string is present in the list.
The find function returns an iterator to the element if found, otherwise it returns an iterator to the end of the list.
We check if the iterator is not equal to the end iterator to determine if the element is present.
Finally, we print the result to standard output.

C++ Program

#include <iostream>
#include <list>
#include <string>

int main() {
    std::list<std::string> myList = {"apple", "banana", "cherry", "date", "elderberry"};
    std::string searchElement = "cherry";
    auto it = std::find(myList.begin(), myList.end(), searchElement);
    bool isPresent = it != myList.end();
    std::cout << "Element presence in list: " << std::boolalpha << isPresent << std::endl;
    return 0;
}

Output

Element presence in list: true

Summary

In this tutorial, we learned How to check if a Specific Element is present in the List in C++ language with well detailed examples.

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How to check if a Specific Element is present in the List in C++

How to check if a Specific Element is present in the List in C++ ?

Answer

✐ Examples

1 Check Element Presence in List (Integer)

C++ Program

Output

2 Check Element Presence in List (String)

C++ Program

Output

Summary

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