Cpp variables

content/cpp/concepts/variables/variables.md

@@ -1,6 +1,6 @@
 ---
 Title: 'Variables'
-Description: 'A variable refers to a storage location in the computer’s memory that one can set aside to save, retrieve, and manipulate data. To create a variable, the type must be specified and a value must be assigned to it.'
+Description: 'A variable refers to a storage location in the computer’s memory that one can set aside to save, retrieve, and manipulate data.'
 Subjects:
   - 'Computer Science'
   - 'Game Development'
@@ -12,11 +12,11 @@ CatalogContent:
   - 'paths/computer-science'
 ---
 
-A **variable** refers to a storage location in the computer’s memory that one can set aside to save, retrieve, and manipulate data.
+A **variable** refers to a storage location in the computer’s memory that one can set aside to save, retrieve, and manipulate data. Variables act as containers for storing information that can be changed or updated during the execution of a program.
 
 ## Declare a Variable
 
-To create a variable, the type must be specified and a value must be assigned to it:
+To declare a variable, the type of data the variable will hold must be specified, followed by the variable name. Optionally, a value can be assigned to the variable at the time of declaration:
 
 ```pseudo
 type name = value;
@@ -46,8 +46,75 @@ The output would be:
 I am 30 years old.
 ```
 
+## Data Types in Variables
+
+Each variable in programming has a type, which defines the kind of data it can hold. Here are some common data types:
+
+- **int**: for integers (whole numbers), e.g.,
+
+```cpp
+int score = 10;
+```
+
+- **float**: A single-precision floating-point number, typically occupying 4 bytes (32 bits). It offers less precision and is used when memory efficiency is more important than accuracy, e.g.,
+
+```cpp
+float pi = 3.14159;
+```
+
+- **double**: A double-precision floating-point number, typically occupying 8 bytes (64 bits). It provides more precision and is the default choice when you need to store decimal numbers in C++.
+
+```cpp
+double pi = 3.14159265358979323846;
+```
+
+- **char**: A single character, e.g.,
+
+```cpp
+char letter = 'A';
+```
+
+- **bool**: for boolean values (true or false), e.g.,
+
+```cpp
+bool isAdmin = true;
+```
+
+## Example
+
+The below example shows the usage of variables:
+
+```cpp
+#include <iostream>
+
+int main() {
+  int age = 25;
+  double temperature = 36.6;
+  char initial = 'R';
+  bool isSunny = true;
+
+  std::cout << "Age: " << age << std::endl;
+  std::cout << "Temperature: " << temperature << "°C" << std::endl;
+  std::cout << "Initial: " << initial << std::endl;
+  std::cout << "Is it sunny? " << (isSunny ? "Yes" : "No") << std::endl;
+
+  return 0;
+}
+```
+
+The code above generates the following output:
+
+```shell
+Age: 25
+Temperature: 36.6°C
+Initial: R
+Is it sunny? Yes
+```
+
 ## Codebyte Example
 
+Run the codebyte to understand how variables work:
+
 ```codebyte/cpp
 #include <iostream>