Sum all numbers in a container:
<pre><code class="lang-cpp">#include &lt;iostream&gt;
#include &lt;vector&gt;
#include &lt;numeric&gt; // for std::accumulate

int main() {
 std::vector&lt;float&gt; numbers = {1, 2, 3, 4, 5};

 // Calculate the sum of elements using std::accumulate
 float sum = std::accumulate(numbers.begin(), numbers.end(), 0.0); //0.0 is initial value

 std::cout &lt;&lt; "Sum of elements: " &lt;&lt; sum &lt;&lt; std::endl;

 return 0;
}
</code></pre>
<h3 id="heading-example-of-using-inbuilt-sort-function">Example of Using inbuilt sort function</h3>
<pre><code class="lang-cpp">int a[4] = {5,9,8,1};

cout&lt;&lt;sizeof(a)/sizeof(int)&lt;&lt;'\n'; //getting size of a


sort(a,a+(sizeof(a)/sizeof(int))); //
for (int var = 0; var &lt; 4; ++var) {
 cout&lt;&lt;a[var]&lt;&lt;",";
}
cout&lt;&lt;"\n";

vector&lt;int&gt; av={55,3,4,2,87};
sort(av.begin(), av.end());

for(auto v: av)
 cout&lt;&lt;v&lt;&lt;",";
</code></pre>

**Sum all numbers in a container:**

```cpp
#include <iostream>
#include <vector>
#include <numeric> // for std::accumulate

int main() {
 std::vector<float> numbers = {1, 2, 3, 4, 5};

 // Calculate the sum of elements using std::accumulate
 float sum = std::accumulate(numbers.begin(), numbers.end(), 0.0); //0.0 is initial value

 std::cout << "Sum of elements: " << sum << std::endl;

 return 0;
}
```

### Example of Using inbuilt sort function

```cpp
int a[4] = {5,9,8,1};

cout<<sizeof(a)/sizeof(int)<<'\n'; //getting size of a


sort(a,a+(sizeof(a)/sizeof(int))); //
for (int var = 0; var < 4; ++var) {
 cout<<a[var]<<",";
}
cout<<"\n";

vector<int> av={55,3,4,2,87};
sort(av.begin(), av.end());

for(auto v: av)
 cout<<v<<",";
```

C++ STL Notes

Example of Using inbuilt sort function