By | 05.11.2016

# Find nCr and nPr using function

Write a C program to find nCr and nPr using function. Here’s simple program to find nCr and nPr using function in C Programming Language.

Below is the source code for C program to find nCr and nPr using function which is successfully compiled and run on Windows System to produce desired output as shown below :

## SOURCE CODE : :

```/*  C program to find nCr and nPr using function  */

#include <stdio.h>

long factorial(int);
long find_ncr(int, int);
long find_npr(int, int);

int main()
{
int n, r;
long ncr, npr;

printf("Enter the value of n :: ");
scanf("%d",&n);
printf("\nEnter the value of r :: ");
scanf("%d",&r);

ncr = find_ncr(n, r);
npr = find_npr(n, r);

printf("\n%dC%d = %ld\n", n, r, ncr);
printf("\n%dP%d = %ld\n", n, r, npr);

return 0;
}

long find_ncr(int n, int r) {
long result;

result = factorial(n)/(factorial(r)*factorial(n-r));

return result;
}

long find_npr(int n, int r) {
long result;

result = factorial(n)/factorial(n-r);

return result;
}

long factorial(int n) {
int c;
long result = 1;

for (c = 1; c <= n; c++)
result = result*c;

return result;
}```

## OUTPUT : :

```/*  C program to find nCr and nPr using function  */

Enter the value of n :: 4

Enter the value of r :: 2

4C2 = 6

4P2 = 12

Process returned 0```

Above is the source code for C program to find nCr and nPr using function which is successfully compiled and run on Windows System.The Output of the program is shown above .

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