Question

6. Write a program to find factorial of a given number

Answer 1

Answer:

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C program to find factorial of a number

long factorial(int);

int main() { int n;

printf("Enter a number to calculate its factorial\n"); scanf("%d", &n);

printf("%d! = %ld\n", n, factorial(n));

return 0; }

long factorial(int n) { int c; long r = 1;

for (c = 1; c <= n; c++) r = r * c;

return r; }

Answer 2

Here's a Python program to find the factorial of a given number using a recursive function:

def factorial(n):

   if n == 0:

       return 1

   else:

       return n * factorial(n-1)

# Test the function with an example input

number = 5

result = factorial(number)

print("The factorial of", number, "is", result)

Explanation:

• This program defines a function called factorial that takes an integer n as input and returns the factorial of n.
• The function uses recursion to calculate the factorial: if n is 0, it returns 1 (since 0! = 1), otherwise, it multiplies n by the factorial of n-1.
• In the main program, we test the function with an example input of 5 and print the result.
• You can replace the number with any other integer to find its factorial.

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