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Part 5 Recursive function c# example
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Link for code samples used in the demo
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What is a recursive function in c#? Give an example. This is a common c# interview question.
A recursive function is a function that calls itself. Let's look at an example of computing factorial of a number with and without recursion.
Program to compute factorial of a number without using recursion.
public class Program
{
public static void Main()
{
// Prompt the user to enter a number
Console.WriteLine("Please enter a number");
// Read the number from the console and convert to int
int userNumber = Convert.ToInt32(Console.ReadLine());
// Call Factorial function and pass the user entered number to it
double factorial = Factorial(userNumber);
// Print the factorial
Console.WriteLine("Factorial of " + userNumber.ToString() + " = " + factorial.ToString());
}
public static double Factorial(int number)
{
// ZERO factorial is 1, so return 1 if number is ZERO.
if (number == 0)
return 1;
double factorial = 1;
// Compute the factorial using a for loop
for (int i = number; i ]= 1; i--)
{
factorial = factorial * i;
}
// return the factorial of the anumber
return factorial;
}
}
Program to compute factorial of a number with recursion.
public class Program
{
public static void Main()
{
// Prompt the user to enter a number
Console.WriteLine("Please enter a number");
// Read the number from the console and convert to int
int userNumber = Convert.ToInt32(Console.ReadLine());
// Call Factorial function and pass the user entered number to it
double factorial = Factorial(userNumber);
// Print the factorial
Console.WriteLine("Factorial of " + userNumber.ToString() + " = " + factorial.ToString());
}
public static double Factorial(int number)
{
// ZERO factorial is 1, so return 1 if number is ZERO.
if (number == 0)
return 1;
// Notice that the Factorial method is calling itself here
return number * Factorial(number - 1);
}
}
Healthy diet is very important both for the body and mind. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking our YouTube channel. Hope you can help.
What is a recursive function in c#? Give an example. This is a common c# interview question.
A recursive function is a function that calls itself. Let's look at an example of computing factorial of a number with and without recursion.
Program to compute factorial of a number without using recursion.
public class Program
{
public static void Main()
{
// Prompt the user to enter a number
Console.WriteLine("Please enter a number");
// Read the number from the console and convert to int
int userNumber = Convert.ToInt32(Console.ReadLine());
// Call Factorial function and pass the user entered number to it
double factorial = Factorial(userNumber);
// Print the factorial
Console.WriteLine("Factorial of " + userNumber.ToString() + " = " + factorial.ToString());
}
public static double Factorial(int number)
{
// ZERO factorial is 1, so return 1 if number is ZERO.
if (number == 0)
return 1;
double factorial = 1;
// Compute the factorial using a for loop
for (int i = number; i ]= 1; i--)
{
factorial = factorial * i;
}
// return the factorial of the anumber
return factorial;
}
}
Program to compute factorial of a number with recursion.
public class Program
{
public static void Main()
{
// Prompt the user to enter a number
Console.WriteLine("Please enter a number");
// Read the number from the console and convert to int
int userNumber = Convert.ToInt32(Console.ReadLine());
// Call Factorial function and pass the user entered number to it
double factorial = Factorial(userNumber);
// Print the factorial
Console.WriteLine("Factorial of " + userNumber.ToString() + " = " + factorial.ToString());
}
public static double Factorial(int number)
{
// ZERO factorial is 1, so return 1 if number is ZERO.
if (number == 0)
return 1;
// Notice that the Factorial method is calling itself here
return number * Factorial(number - 1);
}
}
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