![Write a C Program to find the Factorial of a number factorial, c, program, Sumit Kar, Timus Rak](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgEEuiVQujzDYGlv1PMDzDKYb5ozvCbIjo_Mt3FOu_A8h6GVex9UkCglRQEuc0wTKxbm_OgzCSMsAl0xTsTrdYwnZVmL3fFis99MAlE7B7SZTE3u-l8-Yoy14a7zhjLCMXS_y2grkLeaBz/s1600/c-programming-tutorial.jpg)
/*
Summary: Factorial is represented using '!', so five factorial will be written as (5!),n factorial as (n!).
n! = n*(n-1)*(n-2)*(n-3)...3.2.1 and zero factorial is defined as one i.e. 0! = 1.
*/
/* Using While Loop */
#include<stdio.h>
void main()
{
int a,f,i;
printf("Enter a number: ");
scanf("%d",&a);
f=1;
i=1;
while(i<=a)
{
f = f * i;
i++;
}
printf("Factorial: %d",f);
}
/* Using For Loop */
#include<stdio.h>
void main()
{
int a,f,i;
printf("Enter a number: ");
scanf("%d",&a);
f=1;
for(i=1;i<=a;i++)
f = f * i;
printf("Factorial: %d",f);
}
/*Using Recursion */
#include<stdio.h>
int fact(int);
int main(){
int num,f;
printf("\nEnter a number: ");
scanf("%d",&num);
f=fact(num);
printf("\nFactorial of %d is: %d",num,f);
return 0;
}
//recursive function
int fact(int n){
if(n==1)
return 1;
else
return(n*fact(n-1));
}
/*
Summary: Factorial is represented using '!', so five factorial will be written as (5!),n factorial as (n!).
n! = n*(n-1)*(n-2)*(n-3)...3.2.1 and zero factorial is defined as one i.e. 0! = 1.
*/
/* Using While Loop */
#include<stdio.h>
void main()
{
int a,f,i;
printf("Enter a number: ");
scanf("%d",&a);
f=1;
i=1;
while(i<=a)
{
f = f * i;
i++;
}
printf("Factorial: %d",f);
}
/* Using For Loop */
#include<stdio.h>
void main()
{
int a,f,i;
printf("Enter a number: ");
scanf("%d",&a);
f=1;
for(i=1;i<=a;i++)
f = f * i;
printf("Factorial: %d",f);
}
/*Using Recursion */
#include<stdio.h>
int fact(int);
int main(){
int num,f;
printf("\nEnter a number: ");
scanf("%d",&num);
f=fact(num);
printf("\nFactorial of %d is: %d",num,f);
return 0;
}
//recursive function
int fact(int n){
if(n==1)
return 1;
else
return(n*fact(n-1));
}
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