Default (#317)

* inline funtion

* default function added

docs/day-08/default-argument.md

@@ -6,15 +6,55 @@ sidebar_label: "Default Arguments"
 slug: default-arguments-in-cpp
 ---
 
-TASK:
 
-1. What is Default Arguments in C++?
-2. Explain the Syntax of Default Arguments in C++.
-3. How to Declare and Define a Function with Default Arguments in C++?
-4. C++ Default Arguments Example
+### What is Default Arguments in C++?
+Default arguments in C++ allow you to initialize a function parameter with a default value. This means that if the caller of the function doesn't provide a value for that parameter, the default value will be used. Default arguments provide flexibility and convenience in function calls by allowing some parameters to be optional.
 
-Add More...
 
-IMAGE FILE:
 ![Switch in CPP](../../static/img/day-08/default-argument.png)
 
+
+### Explain the Syntax of Default Arguments in C++.
+
+```cpp
+
+return_type function_name(type1 parameter1 = default_value1, type2 parameter2 = default_value2, ...);
+
+```
+Here, return_type is the type of value the function returns, function_name is the name of the function, type1, type2, etc., are the types of the function parameters, parameter1, parameter2, etc., are the names of the parameters, and default_value1, default_value2, etc., are the default values assigned to the parameters.
+
+
+### How to Declare and Define a Function with Default Arguments in C++?
+
+```cpp
+
+#include <iostream>
+using namespace std;
+
+void printMessage(string message = "Hello, World!") {
+ cout << message << endl;
+}
+
+```
+In this example, the function printMessage is declared with a default argument message set to "Hello, World!". If no argument is provided when calling this function, it will print "Hello, World!".
+
+### C++ Default Arguments Example.
+
+```cpp
+
+#include <iostream>
+using namespace std;
+
+void printNumber(int num, int width = 10) {
+ cout.width(width);
+ cout << num << endl;
+}
+
+int main() {
+ printNumber(123); // Output: " 123"
+ printNumber(456, 5); // Output: " 456"
+
+ return 0;
+}
+
+```