set max_size() function in C++ STL

The set::max_size() is a built-in function in C++ STL which returns the maximum number of elements a set container can hold.

Syntax:

set_name.max_size()

Parameters: This function does not accept any parameters.

Return Value: This function returns the maximum number of elements a set container can hold.

Below program illustrates the above funnction:

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// CPP program to demonstrate the
// set::max_size() function
#include <bits/stdc++.h>
using namespace std;
int main()
{
  
    set<int> s1, s2;
  
    s1.insert(1);
  
    // If set already contains elements
    cout << s1.max_size() << endl;
  
    // If set does not have elements
    cout << s2.max_size();
  
    return 0;
}

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Output:

461168601842738790
461168601842738790


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