[Term Entry] C++ Sets: size()

content/cpp/concepts/sets/terms/size.md

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+---
+Title: '.size()'
+Description: 'Returns the amount of elements in the set.'
+Subjects:
+  - 'Computer Science'
+  - 'Game Development'
+Tags:
+  - 'Data Types'
+  - 'Sets'
+CatalogContent:
+  - 'learn-c-plus-plus'
+  - 'paths/computer-science'
+---
+
+The **`.size()`** method is used to determine the amount of elements that are currently stored in a set.
+
+## Syntax
+
+```pseudo
+setName.size();
+```
+
+## Example
+
+## Obtaining the median of the numbers in a set
+
+```cpp
+#include <iostream>
+#include <set>
+
+int main() {
+  // Initiate set
+  std::set<int> numbers;
+
+  // Insert values into set
+  numbers.insert(24);
+  numbers.insert(26);
+  numbers.insert(30);
+  numbers.insert(20);
+
+  int sum = 0;
+  for (int num : numbers) {
+      sum += num;
+  }
+
+  // Print amount of elements in set "numbers"
+  std::cout << "the median of the integers in the set is: " << sum/numbers.size() << "\n";
+
+}
+
+```
+
+### prints: 
+```shell
+the median of the integers in the set is: 25
+```
+
+## Codebyte Example
+
+The following codebyte example creates a `grades` set of type `int` and inserts several values before being printed:
+
+```codebyte/cpp
+#include <iostream>
+#include <set>
+
+int main() {
+  // Initiate set
+  std::set<int> numbers;
+
+  // Insert values into set
+  numbers.insert(90);
+  numbers.insert(34);
+  numbers.insert(2);
+  numbers.insert(101);
+
+  // Print amount of elements in set "numbers"
+  std::cout << "The set contains " << numbers.size() << " elements.\n";
+
+}
+```