Question

hi any Java programmer here can you tell me the answer without using scanner class or only the syntax please see do not answer if you do not know the answer thanks


Write a program to calculate factorial of a number​

Answer 1

To understand this example, you should have the knowledge of following C programming topics:

C Programming Data Types

C Programming Operators

C if...else Statement

C Programming for Loop

The factorial of a positive number n is given by:

factorial of n (n!) = 1*2*3*4....n

The factorial of a negative number doesn't exist. And, the factorial of 0 is 1, 0! = 1

Example: Factorial of a Number

#include <stdio.h>

int main()

{

int n, i;

unsigned long long factorial = 1;

printf("Enter an integer: ");

scanf("%d",&n);

// show error if the user enters a negative integer

if (n < 0)

printf("Error! Factorial of a negative number doesn't exist.");

else

{

for(i=1; i<=n; ++i)

{

factorial *= i; // factorial = factorial*i;

}

printf("Factorial of %d = %llu", n, factorial);

}

return 0;

}

Output

Enter an integer: 10

Factorial of 10 = 3628800

This program takes a positive integer from the user and computes factorial using for loop.