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C program to Calculate the Value of nPr

C program to Calculate the Value of nPr

This C Program calculates the value of nPr. Here we need find all possible rearrangement of the element i.e all the possible permutation value. A permutation is a re-arrangement of elements of a set. Any duplications of the collected elements in different orders is allowed. A permutation therefore tends to be a large number.


    #include <stdio.h>
     

    void main(void)

    {

       printf("%d\n", fact(8));

       int n, r;

       printf("Enter value for n and r\n");

       scanf("%d%d", &n, &r);

       int npr = fact(n) / fact(n - r);

       printf("\n Permutation values is = %d", npr);

    }
     

    int fact(int j)

    {

       if (j <= 1)

           return 1;

       return j * fact(j - 1);

    }

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