Use of at() in stl

#1

what is at() used for in stl

#2

Hi @Namanjain123, at Returns a reference to the element at position i in the vector.
eg: -

#include <iostream>
#include <vector>

int main ()
{
  std::vector<int> myvector (10);   // 10 zero-initialized ints

  // assign some values:
  for (unsigned i=0; i<myvector.size(); i++)
    myvector.at(i)=i;

  std::cout << "myvector contains:";
  for (unsigned i=0; i<myvector.size(); i++)
    std::cout << ' ' << myvector.at(i);
  std::cout << '\n';

  return 0;
}

myvector contains: 0 1 2 3 4 5 6 7 8 9

In case of any doubt feel free to ask :slight_smile:
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#3

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