set::insert() function in C++ STL

In C++, the standard library gives us the facility to use the Sets as a type of associative containers in which each element has to be unique. The set::insert() is a C++ Standard Library function which is used to insert an element to the set container. After every insertion, the size of set increased by 1.

Syntax

Set_Name.insert( Element );

Parameter: The set::insert() function accepts only single parameter:

• Element: This parameter is the element to be inserted in the set container.

Return value: The set::insert() function returns the iterator pointing to the inserted element.

Example of set::insert() Function

#include <bits/stdc++.h>

using  namespace std;

int  main()

{

set<int> SET;

SET.insert(10);

SET.insert(4);

SET.insert(12);

SET.insert(15);

auto val = SET.find(3);

if  (val != SET.end())

{

cout <<  "Element Found";

}

else

{

cout <<  "Element Not Found";

}

return 0;

}

Output

Element Not Found