void findFactorial(int,int *); int main(){ int i,factorial,num; […] To Find Factorial Of A Number Using C Program" />

To Find Factorial Of A Number Using C Program

Levels of difficulty: / perform operation:

Program 1: Factorial program in c using for loop

```#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;
}
```

Result

```Enter a number: 8
Factorial of 8 is: 40320
```

Program 2: Factorial program in c using pointers

```#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;
}
```

Result

```Enter a number: 8
Factorial of 8 is: 40320
```

Program 3: Factorial program in c using function

```#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;
}
```

Result

```Enter a number: 8
Factorial of 8 is: 40320
```

Program 4: 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;
}
```

Result

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

Program 5: 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;
}
```

Result

```Enter a number: 5
Factorial of 5 is: 120
```