This C program uses a while loop to calculate the factorial of a user-input number. The user is prompted to enter a number, then the program multiplies incrementing integers from 1 to the input number, storing the running product in a variable f. Finally, it prints the input number and its calculated factorial value.

1. FACTORIA
// write a program to find out factorial
value of a number
#include<stdio.h>
#include<conio.h>
void main()
{
int i=1,f=1,a;
clrscr();
printf("enter a number");
scanf("%d",&a);
while(i<=a)
{
f=f*i;
i++;
}
printf("factorial of%d is:%d",a,f);
getch();
} //created by: ankit dubey
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