# Find Nth term of the series 1, 1, 2, 6, 24…

Given a number N. The task is to write a program to find the Nth term in the below series:

1, 1, 2, 6, 24…

Examples:

```Input: 3
Output: 2
For N = 3
Nth term = (N-1)!
= 2
Input: 5
Output: 24
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Nth term of the series is given by below formula:

`Nth term = ( N-1)! `

Below is the required implementation:

## C++

 `// CPP program to find N-th term of the series: ` `// 1, 1, 2, 6, 24... ` `#include ` `using` `namespace` `std; ` ` `  `// calculate Nth term of series ` `int` `nthTerm(``int` `N) ` `{ ` `    ``if` `(N <= 1) ` `        ``return` `1; ` ` `  `    ``int` `i, fact = 1; ` `    ``for` `(i = 1; i < N; i++) ` `        ``fact = fact * i; ` ` `  `    ``return` `fact; ` `} ` ` `  `// Driver Function ` `int` `main() ` `{ ` `    ``int` `N = 3; ` ` `  `    ``cout << nthTerm(N); ` ` `  `    ``return` `0; ` `} `

## Java

 `// Java program to find the Nth term ` `import` `java.io.*; ` ` `  `// calculate Nth term of this series ` `// 1, 1, 2, 6, 24... ` `class` `Nth { ` `    ``public` `int` `nthTerm(``int` `N) ` `    ``{ ` `        ``// By using above formula ` `        ``if` `(N <= ``1``) ` `            ``return` `1``; ` ` `  `        ``int` `i, fact = ``1``; ` `        ``for` `(i = ``1``; i < N; i++) ` `            ``fact = fact * i; ` ` `  `        ``return` `fact; ` `    ``} ` `} ` `// Main class for main method ` `class` `GFG { ` ` `  `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` ` `  `        ``int` `N = ``3``; ` ` `  `        ``// create object of Class Nth ` `        ``Nth a = ``new` `Nth(); ` ` `  `        ``// call and print Nth term ` `        ``System.out.println(a.nthTerm(N)); ` `    ``} ` `} `

## Python 3

 `# Python 3 program to find  ` `# N-th term of the series:  ` `# 1, 1, 2, 6, 24...  ` ` `  `# Function to calculate  ` `# Nth term of series  ` `def` `nthTerm(n) : ` ` `  `    ``if` `n <``=` `1` `: ` `        ``return` `1` ` `  `    ``fact ``=` `1` `    ``for` `i ``in` `range``(``1``, N) : ` `        ``fact ``=` `fact ``*` `i ` ` `  `    ``return` `fact ` ` `  `# Driver code ` `if` `__name__ ``=``=` `"__main__"` `: ` ` `  `    ``N ``=` `3` ` `  `    ``# function calling ` `    ``print``(nthTerm(N)) ` ` `  `# This code is contributed  ` `# by ANKITRAI1 `

## C#

 `// C# program to find the  ` `// Nth term of the series ` `// 1, 1, 2, 6, 24... ` `using` `System; ` ` `  `// calculate Nth term  ` `class` `GFG  ` `{ ` `public` `int` `nthTerm(``int` `N) ` `{ ` `    ``// By using above formula ` `    ``if` `(N <= 1) ` `        ``return` `1; ` ` `  `    ``int` `i, fact = 1; ` `    ``for` `(i = 1; i < N; i++) ` `        ``fact = fact * i; ` ` `  `    ``return` `fact; ` `} ` ` `  `// Driver Code ` `public` `static` `void` `Main() ` `{ ` `    ``int` `N = 3; ` ` `  `    ``// create object of Class GFG ` `    ``GFG a = ``new` `GFG(); ` ` `  `    ``// call and print Nth term ` `    ``Console.Write(a.nthTerm(N)); ` `} ` `} ` ` `  `// This code is contributed  ` `// by ChitraNayal `

## PHP

 ` `

Output:

```2
```

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