# Calculate nCr value in R Programming – choose() Function

R Language offers a direct function that can compute the nCr value without writing the whole code for computing nCr value.

Syntax: choose(n, r)

Parameters:
n: Number of elements
r: Number of combinations

Returns: The number of r combinations from a total of n elements, i.e, nCr value.

Example 1:

 `# R program to calculate nCr value  ` `   `  `# Using choose() method  ` `answer1 <``-` `choose(``3``, ``2``)  ` `answer2 <``-` `choose(``3``, ``7``)   ` `answer3 <``-` `choose(``7``, ``3``) ` ` `  `print``(answer1)  ` `print``(answer2)  ` `print``(answer3)  `

Output:

```3
0
35
```

Example 2: If we provide the value of n and r such that n < r then choose(n, r) will return 0.

 `# R program to calculate nCr value  ` `    `  `# Using choose() method  ` `answer1 <``-` `choose(``2``, ``3``)  ` `answer2 <``-` `choose(``3``, ``6``)   ` `answer3 <``-` `choose(``3``, ``7``) ` `  `  `print``(answer1)  ` `print``(answer2)  ` `print``(answer3)  `

Output:

```0
0
0
```
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