Question

Write a program to read a number from user and calculate its factorial.​

Answer 1

Coding:

# Python program to find the factorial of a number provided by the user.

num = int(input("Enter a number: "))

factorial = 1

if num < 0:

  print("Factors don't exist for negative numbers")

elif num == 0:

  print("The factorial of 0 is 1")

else:

  for i in range(1,num + 1):

      factorial = factorial*i

  print("The factorial of",num,"is",factorial)

Answer 2

class Test

{

static int factorial(int n)

{

int res = 1, i;

for (i = 2; i <= n; i++)

res *= i;

return res;

}

public static void main(String[] args)

{

int num = 5;

System.out.println("Factorial of " + num + " is " + factorial(5));

}

}