Factorial Iterative Program Using C Programming Language

 #include   <stdio.h>

long   int  iterativeFactorial( long   int  input);

int  main() {

long   int  number, result;

printf( "Factorial of a number: \n" );

printf( "\n" );

printf( "Enter a Whole Number (max. 12): \n" );

scanf( "%ld" , &number);

printf( "\n" );

if  (number > 12) {

printf( "Number > 12 \n" );

printf( "\n" );

return  1;

}

result = iterativeFactorial(number);

if  (result == -1) {

printf( "Invalid Input \n" );

}

else  {

printf( "(%ld)! = %ld \n" , number, result);

}

printf( "\n" );

return  0;

}

long   int  iterativeFactorial( long   int   input )

{

int  factorial = 1;

for  ( int  i = 1; i <=  input ; i++) {

factorial *= i;

}

return  factorial;

}