## INDEX

### TO FIND FACTORIAL OF A NUMBER USING C PROGRAM

Code 1:
1. C code for factorial of a number
2. C program to find the factorial of a given number
3. Factorial program in c using while loop
4. Factorial program in c without using recursion

#include<stdio.h>
int main(){
int i=1,f=1,num;

printf("Enter a number: ");
scanf("%d",&num);

while(i<=num){
f=f*i;
i++;
}

printf("Factorial of %d is: %d",num,f);
return 0;
}

Sample output:
Enter a number: 5
Factorial of 5 is: 120

Code 2:
1. Factorial program in c using for loop
2. Simple factorial program in c
3. C program to calculate factorial

#include<stdio.h>
int main(){
int i,f=1,num;

printf("Enter a number: ");
scanf("%d",&num);

for(i=1;i<=num;i++)
f=f*i;

printf("Factorial of %d is: %d",num,f);
return 0;
}

Code 3:
1. Factorial program in c using pointers
2. How to calculate factorial in c
3. Factorial program in c language

#include<stdio.h>

void findFactorial(int,int *);
int main(){
int i,factorial,num;

printf("Enter a number: ");
scanf("%d",&num);

findFactorial(num,&factorial);
printf("Factorial of %d is: %d",num,*factorial);

return 0;
}

void findFactorial(int num,int *factorial){
int i;

*factorial =1;

for(i=1;i<=num;i++)
*factorial=*factorial*i;
}

Code 4:
1. Factorial program in c using function
2. C program to find factorial of a number

#include<stdio.h>

int findFactorial(int);
int main(){
int i,factorial,num;

printf("Enter a number: ");
scanf("%d",&num);

factorial = findFactorial(num);
printf("Factorial of %d is: %d",num,factorial);

return 0;
}

int findFactorial(int num){
int i,f=1;

for(i=1;i<=num;i++)
f=f*i;

return f;
}
Sample output:
Enter a number: 8
Factorial of 8 is: 40320

Code 5:
1. 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: ");
for(num=min;num<=max;num++){
f=1;

for(i=1;i<=num;i++)
f=f*i;

printf("%ld ",f);
}

return 0;
}

Sample output:
Enter the minimum range: 1
Enter the maximum range: 10
Factorial series in given range: 1 2 6 24 120 720 5040 40320 362880 3628800

Algorithm:

Factorial value

Factorial of number is defined as:
Factorial (n) = 1*2*3 … * n
For example: Factorial of 5 = 1*2*3*4*5 = 120
Note: Factorial of zero = 1

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