C Program to accept number and print it's factorial.| Using C language| C Program series 49|

👨‍💻C Program to accept number and print it's factorial.

Code :

    /*

    C Program to accept number and print it's factorial.

    For Example:n=5

   

    5! = 120

   

    */

   

    #include<stdio.h>

    main()

    {

        printf("C Program to accept number and print it's factorial.\n\n");

       

        int i,n;

        float factorial=1;//using float data type for handling very big values.

        //For example int data type cannot handle the answer of 15!.

       

        printf("Enter positive number:");

        scanf("%d",&n);

       

        if(n<0)

        {

            printf("Invalid input (%d)!\nOnly positive value.",n);

            return 0;

        }

       

        for(i=1;i<=n;i++)

        {

            factorial=factorial*i;

        }

        printf("==> %d! = %.0f",n,factorial);

        //%.0f means zero decimals after the decimal point.

    }

The output of Code:

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