C Program To Find Factorial of A Number

Code 1: Factorial program in c using for loop

#include<stdio.h>

int main()

{

  int i,fact=1,num;

  printf("Enter a number: ");

  scanf("%d",&num);

  for(i=1;i<=num;i++)

      fact=fact*i;

  printf("Factorial of the number is: %d",fact);

  return 0;

}

Sample output:

Enter a number:4

Factorial of the number is: 24 

____________________________________________________________

 

Code 2:Factorial program in c using function

#include<stdio.h>

int factorial(int);

 

int main(){

  int i,fact,num;

  printf("Enter a number: ");

  scanf("%d",&num);

  fact = factorial(num);

  printf("Factorial of the number is: %d"fact);

  return 0;

}

int factorial(int num){

    int i,f=1;

    for(i=1;i<=num;i++)

      f=f*i;

     return f;

}

output:

Enter a number:4

Factorial of the number is: 24

  ____________________________________________________________

 

Code 3:C program to find the factorial of a given number

#include<stdio.h>

int main()

{

  int i=1,fact=1,num;

  printf("Enter a number: ");

  scanf("%d",&num);

  while(i<=num)

   {

      fact=fact*i;

      i++;

  }

  printf("Factorial of the number is: %d",fact);

  return 0;

}

Sample output:

Enter a number:4

Factorial of the number is: 24

____________________________________________________________ 

Code 4:Factorial program in c using pointers

#include<stdio.h>

void factorial(int,int *);

 

int main()

{

  int i,fact,num;

  printf("Enter a number: ");

  scanf("%d",&num);

  factorial(num,&fact);

  printf("Factorial of the number is: %d",*fact);

  return 0;

}

void factorial(int num,int *factorial)

{

    int i;

    *fact =1;

    for(i=1;i<=num;i++)

      *fact=*fact*i;

}

output:

Enter a number:4

Factorial of the number is: 24

____________________________________________________________

Code 5: Program for Factorial series in c

#include<stdio.h>

 

int main()

{

  long f=1;

  int i,num,min,max;

  printf("Enter the minimum range: ");

  scanf("%d",&min);

  printf("Enter the maximum range: ");

  scanf("%d",&max);

  printf("Factorial series in given range is: ");

  for(num=min;num<=max;num++){

    f=1;

    for(i=1;i<=num;i++)

      f=f*i;

    printf("%ld ",f);

  }

  return 0;

}

output:

Enter the minimum range: 1

Enter the maximum range: 5

Factorial series in given range is: 1 2 6 24 120