...the lower bound of 5 in the vector.
auto it = lower_bound(v.begin(), v.end(), 5);
// Print the lower bound.
cout << *it << endl;
return 0;
}
```
This code will print the following output:
```
5
```
**Hashtags:**
* #C++
* #data structures
* #algorithms
* #Lower bound
* #upper bound