Closes #7134 : Added a new entry for swap() method under strings in C++.

content/cpp/concepts/strings/terms/swap/swap.md

@@ -0,0 +1,61 @@
+---
+Title: '.swap()'
+Description: 'Exchanges the contents of two strings.'
+Subjects:
+  - 'Computer Science'
+  - 'Game Development'
+Tags:
+  - 'Strings'
+  - 'Functions'
+  - 'Methods'
+CatalogContent:
+  - 'learn-c-plus-plus'
+  - 'paths/computer-science'
+---
+
+The **`.swap()`** method for strings is used to exchange the contents of two strings efficiently.
+
+## Syntax
+
+```pseudo
+string1.swap(string2);
+```
+
+After calling the `.swap()` method, the contents of `string1` and `string2` are exchanged: `string1` now holds the original contents of `string2`, and `string2` holds the original contents of `string1`.
+
+## Example
+
+Let us consider an example where we have 2 strings - `a` and `b` with the following original values before the `a.swap(b)` method is called : 
+string a = "apple";
+string b = "banana";
+
+After the `a.swap(b)` method is called , the values of strings `a` and `b` are swapped and the strings now hold the following new values :
+string a = "banana";
+string b = "apple";
+
+## Codebyte Example
+
+In the example below, `.swap()` is called on the `place1` and `place2` strings:
+
+```codebyte/cpp
+#include <iostream>
+#include <string>
+
+int main() {
+
+    std::string place1 = "Los Angeles";
+    std::string place2 = "New York";
+
+    std::cout << "Before swap:\n";
+    std::cout << "Place 1 : " << place1 << "\n";
+    std::cout << "Place 2 : " << place2 << "\n";
+
+    place1.swap(place2);
+
+    std::cout << "After swap:\n";
+    std::cout << "Place 1 : " << place1 << "\n";
+    std::cout << "Place 2 : " << place2 << "\n";
+
+    return 0;
+}
+```