Factorial Number Using C

Mathematically, factorial of any number means to multiply a series of desecending natural numbers ie) upto 1.

Facts About Factorial Numbers

• 5! is usually pronounced as "5 factorial" by mathematicians
• Factorial of 0 is 1 i.e) 0! = 1

Pictorical View

Here is the most impressive structures built by humans in ancient time "The Pyramids".

C Program - Factorial Number

Let us write a c program to find factorial for user entered number

#include <stdio.h>
int main()
{
int a, i;
printf("Enter a number: ");
scanf("%d",&a);
for(i = a-1;i > 0;i--)
{
a *= i;
}
printf("%d ",a);
return 0;
}

Enter a number : 5
Factorial of 5 is 120

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