Write a program in C to find the factoial of 5?

Answer 1

/* gcc -ansi -Wall -Wextra -pedantic -s -static 0.c -o 0 */

#include <stdio.h>

int main ( )

{

int n = 5 , factorial = 1 ;

while ( n != 0 )

{

factorial *= n ;

n -- ;

}

printf ( "%i\n" , factorial ) ;

return 0;

}

Answer 2

Use the following function:

unsigned fact (unsigned num) { return num < 2 ? 1 : num * fact (num-1); }

Note that if sizeof (unsigned) is only 4 (bytes), this function can only handle factorials up to fact (12). However it will easily handle fact (4), returning 4*3*2*1=24.

The non-recursive solution is as follows:

unsigned fact (unsigned num) {

unsigned f = 1;

while (1<num) f *= num--;

return f;

}