c program factorial using while loop and for loop

For beginners
{I am going write the c program but before you need a c compiler(software).there are a lot of compilers(software). like dev c++  Download Code::Blocks,dev c++ its free and install it in your computer.open  dev c++ go to file-->new-->source file.}

#include<stdio.h>

#include<conio.h>

main()

{

      int f=1,c,n;

      printf("enter a number\n");

      scanf("%d",&n);

      for(c=1;c<=n;c++)

      f=f*c;

      printf("factorial of %d is %d",n,f);

      getch();

      }

or

#include<stdio.h>
#include<conio.h>
main()
{
      int f=1,c=1,n;
      printf("enter a number\n");
      scanf("%d",&n);
      while(c<=n)
      {
                 f=f*c;
                 c++;
      }
      printf("factorial of %d is %d",n,f);
      getch();
      }

For beginners

{After typing this program go to execute-->compile & run-->a window will pop-up-->give file name:(anything u like)-->save as type: c source files-->click save.}

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