# Program to print GP (Geometric Progression)

Given first term (a), common ratio (r) and a integer n of the Geometric Progression series, the task is to print th n terms of the series.

Examples:

```Input : a = 2 r = 2, n = 4
Output : 2 4 8 16
```

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

Approach :

We know the Geometric Progression series is like = 2, 4, 8, 16, 32 …….
In this series 2 is the stating term of the series .
Common ratio = 4 / 2 = 2 (ratio common in the series).
so we can write the series as :

t1 = a1
t2 = a1 * r(2-1)
t3 = a1 * r(3-1)
t4 = a1 * r(4-1)
.
.
.
.
tN = a1 * r(n-1)

To print the Geometric Progression series we use the simple formula .

```TN = a1 * r(n-1)
```

## CPP

 `// CPP program to print GP. ` `#include ` `using` `namespace` `std; ` ` `  `void` `printGP(``int` `a, ``int` `r, ``int` `n) ` `{ ` `    ``int` `curr_term; ` `    ``for` `(``int` `i = 0; i < n; i++) { ` `        ``curr_term = a * ``pow``(r, i); ` `        ``cout << curr_term << ``" "``; ` `    ``} ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` `    ``int` `a = 2; ``// starting number ` `    ``int` `r = 3; ``// Common ratio ` `    ``int` `n = 5; ``// N th term to be find ` `    ``printGP(a, r, n); ` `    ``return` `0; ` `} `

## Java

 `// Java program to print GP. ` `class` `GFG { ` `    ``static` `void` `printGP(``int` `a, ``int` `r, ``int` `n) ` `    ``{ ` `        ``int` `curr_term; ` `        ``for` `(``int` `i = ``0``; i < n; i++) { ` `            ``curr_term = a * (``int``)Math.pow(r, i); ` `            ``System.out.print(curr_term + ``" "``); ` `        ``} ` `    ``} ` ` `  `    ``// Driver code ` `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` `        ``int` `a = ``2``; ``// starting number ` `        ``int` `r = ``3``; ``// Common ratio ` `        ``int` `n = ``5``; ``// N th term to be find ` `        ``printGP(a, r, n); ` `    ``} ` `} ` `// This code is contributed by Anant Agarwal. `

## Python3

 `# Python 3 program to print GP. ` ` `  `def` `printGP(a, r, n):  ` `    ``for` `i ``in` `range``(``0``, n):  ` `        ``curr_term ``=` `a ``*` `pow``(r, i) ` `        ``print``(curr_term, end ``=``" "``) ` `     `  ` `  `# Driver code ` ` `  `a ``=` `2` `# starting number ` `r ``=` `3` `# Common ratio ` `n ``=` `5` `# N th term to be find ` ` `  `printGP(a, r, n) ` ` `  `# This code is contributed by ` `# Smitha Dinesh Semwal `

## C#

 `// C# program to print GP. ` `using` `System; ` ` `  `class` `GFG { ` ` `  `    ``static` `void` `printGP(``int` `a, ``int` `r, ``int` `n) ` `    ``{ ` ` `  `        ``int` `curr_term; ` ` `  `        ``for` `(``int` `i = 0; i < n; i++) { ` `            ``curr_term = a * (``int``)Math.Pow(r, i); ` `            ``Console.Write(curr_term + ``" "``); ` `        ``} ` `    ``} ` ` `  `    ``// Driver code ` `    ``public` `static` `void` `Main() ` `    ``{ ` ` `  `        ``int` `a = 2; ``// starting number ` `        ``int` `r = 3; ``// Common ratio ` `        ``int` `n = 5; ``// N th term to be find ` ` `  `        ``printGP(a, r, n); ` `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## PHP

 ` `

Output:

```2 6 18 54 162
```

My Personal Notes arrow_drop_up Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : jit_t, PankajMishra10