Complete printfactorial() Recursive Case: How to Write Code & Get Sample Output with Userval 5

Introduction

The printfactorial() function is used to calculate the factorial of a given number using recursion. This function is useful when you need to calculate the factorial of a large number. In this guide, we will provide you with a step-by-step solution on how to write code for the printfactorial() function and get a sample output with a user value of 5.

Prerequisites

Before you start writing code for the printfactorial() function, you need to have a basic understanding of the following programming concepts:

• Recursion
• Functions
• Control flow statements

How to Write Code for the printfactorial() Function

To write code for the printfactorial() function, follow these steps:

1. Create a new C file and name it printfactorial.c.
2. Open the file in your preferred text editor.
3. Declare the printfactorial() function as follows:

int printfactorial(int n);

1. Define the printfactorial() function as follows:

int printfactorial(int n) {
   if (n == 1) {
      return 1;
   } else {
      return n * printfactorial(n-1);
   }
}

1. Save the file.

How to Get Sample Output with Userval 5

To get a sample output with a user value of 5, follow these steps:

1. Open a terminal window and navigate to the directory where the printfactorial.c file is saved.
2. Compile the printfactorial.c file using the following command:

gcc printfactorial.c -o printfactorial

1. Run the printfactorial executable file using the following command:

./printfactorial

1. Enter the value 5 when prompted.

Enter a number: 5

1. The output should be as follows:

Factorial of 5 is: 120

FAQ

Q1. What is the printfactorial() function?

The printfactorial() function is used to calculate the factorial of a given number using recursion.

Q2. What are the prerequisites for writing code for the printfactorial() function?

Before you start writing code for the printfactorial() function, you need to have a basic understanding of recursion, functions, and control flow statements.

Q3. How do I compile the printfactorial.c file?

You can compile the printfactorial.c file using the following command:

gcc printfactorial.c -o printfactorial

Q4. How do I run the printfactorial executable file?

You can run the printfactorial executable file using the following command:

./printfactorial

Q5. What is the output of the printfactorial() function with a user value of 0?

The output of the printfactorial() function with a user value of 0 is 1.

Related Links

• Recursion in C
• Functions in C
• Control Flow Statements in C