 ### Program 16: To find factorial of a number

Program 16:

```#include<stdio.h>
main()
{
int number,factorial=1,i;
printf("Enter a number for knowing it's factorial\n");
scanf("%d",&number);
for(i=1;i<=number;i++)
{
factorial=factorial*i;
}
printf("%d!=%d\n",number,factorial);
}```
Explanation:
1. Initializes :
• number-for storing given number
• factorial-for storing factorial of a number.
• i for using in loop
2. Prompting user for input through scanf statement.
3. The main logic goes here:(factorial=factorial*i)
• i=1 and i<=number(say 5) which is true then factorial=1*1=1 then i increments by 1
• Now i=2 and as i<=5 which is true then factorial=1*2=2.Now i increases by 1
• Now i=3 and as i<=5 which is true then factorial=2*3=6.Now i increases by 1
• Now i=4 and as i<=5 which is true then factorial=6*4=24.Now i increases by 1
• Now i=5 and as i<=5 which is true then factorial=24*5=120.Now i increases by 1
• Now i=6 and as I is not less or equal to 5 the loop terminates
4. There fore it prints the factorial which is 120.
Output: 