# Program to print number with star pattern

We have to print the pattern as given in the below example.

Examples :

```Input : 5
Output :
1
1*2
1*2*3
1*2
1

Input : 9
Output :
1
1*2
1*2*3
1*2*3*4
1*2*3*4*5
1*2*3*4
1*2*3
1*2
1
```

## C++

 `#include ` `using` `namespace` `std; ` ` `  `// C++ program to print above patern ` `void` `display(``int` `n) ` `{ ` ` `  `    ``// 'sp' used for space and 'st' used for star ` `    ``int` `sp = n / 2, st = 1; ` ` `  `    ``// Outer for loop prints number of lines ` `    ``for` `(``int` `i = 1; i <= n; i++) { ` `        ``for` `(``int` `j = 1; j <= sp; j++) { ` `            ``cout << ``" "``; ` `        ``} ` `         `  `        ``int` `count = 1; ` `        ``for` `(``int` `k = 1; k <= st; k++) { ` `            ``if` `(k % 2 == 0) ` `                ``cout << ``"*"``; ` `            ``else` `                ``cout << count++; ` `        ``} ` ` `  `        ``cout << ``"\n"``; ` ` `  `        ``if` `(i <= n / 2) { ` `             `  `            ``// Before reaching to half after ` `            ``// every line space is decreased ` `            ``// by 1 and star is increased by 2 ` `            ``sp = sp - 1; ` `            ``st = st + 2; ` `        ``} ` `        ``else` `{ ` `             `  `            ``// After reaching to half ` `            ``// space is increased by 1 ` `            ``// and star is decreased by 2 ` `            ``sp = sp + 1; ` `            ``st = st - 2; ` `        ``} ` `    ``} ` `} ` ` `  `// Driver Code ` `int` `main() ` `{ ` `    ``int` `n = 5; ` `    ``display(n); ` `    ``return` `0; ` `} ` ` `  `// This code is contributed by vt_m `

## Java

 `// Java program to print above patern ` `import` `java.util.Scanner; ` `class` `Pattern ` `{ ` `    ``void` `display(``int` `n) ` `    ``{ ` `     `  `        ``// 'sp' used for space and 'st' used for star ` `        ``int` `sp = n / ``2``, st = ``1``; ` `         `  `        ``// Outer for loop prints number of lines ` `        ``for` `(``int` `i = ``1``; i <= n; i++)  ` `        ``{ ` `            ``for` `(``int` `j = ``1``; j <= sp; j++) ` `            ``{ ` `                ``System.out.print(``" "``); ` `            ``} ` `            ``int` `count = ``1``; ` `            ``for` `(``int` `k = ``1``; k <= st; k++)  ` `            ``{ ` `                ``if` `(k % ``2` `== ``0``) ` `                    ``System.out.print(``"*"``); ` `                ``else` `                    ``System.out.print(count++); ` `            ``} ` `             `  `            ``System.out.println(); ` `             `  `            ``if` `(i <= n / ``2``) ` `            ``{ ` `                ``// Before reaching to half after ` `                ``// every line space is decreased ` `                ``// by 1 and star is increased by 2 ` `                ``sp = sp - ``1``; ` `                ``st = st + ``2``; ` `            ``} ` `            ``else` `            ``{ ` `                ``// After reaching to half ` `                ``// space is increased by 1 ` `                ``// and star is decreased by 2 ` `                ``sp = sp + ``1``; ` `                ``st = st - ``2``; ` `            ``} ` `        ``} ` `    ``} ` ` `  `    ``// Driver Code ` `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` `        ``int` `n = ``5``; ` `        ``Pattern p = ``new` `Pattern(); ` `        ``p.display(n); ` `    ``} ` `} `

## Python3

 `# Python3 program to print above patern ` ` `  `def` `display(n): ` ` `  `    ``# 'sp' used for space and  ` `    ``# 'st' used for star ` `    ``sp ``=` `n ``/``/` `2` `    ``st ``=` `1` ` `  `    ``# Outer for loop prints number ` `    ``# of lines ` `    ``for` `i ``in` `range``(``1``, n ``+` `1``):  ` `        ``for` `j ``in` `range``(``1``, sp ``+` `1``): ` `            ``print``(end ``=` `" "``) ` ` `  `        ``count ``=` `1` `        ``for` `k ``in` `range``(``1``, st ``+` `1``):  ` `            ``if` `(k ``%` `2` `=``=` `0``): ` `                ``print``(``"*"``, end ``=` `"") ` `            ``else``: ` `                ``print``(count, end ``=` `"") ` `                ``count ``+``=` `1` `         `  `        ``print``() ` ` `  `        ``if` `(i <``=` `n ``/``/` `2``):  ` `             `  `            ``# Before reaching to half after ` `            ``# every line space is decreased ` `            ``# by 1 and star is increased by 2 ` `            ``sp ``=` `sp ``-` `1` `            ``st ``=` `st ``+` `2` `         `  `        ``else``:  ` `             `  `            ``# After reaching to half ` `            ``# space is increased by 1 ` `            ``# and star is decreased by 2 ` `            ``sp ``=` `sp ``+` `1` `            ``st ``=` `st ``-` `2` `         `  `# Driver Code ` `n ``=` `5` `display(n) ` ` `  `# This code is contributed by  ` `# Mohit kumar 29 `

## C#

 `// C# program to print above patern ` `using System; ` `class Pattern ` `{ ` `    ``void display(int n) ` `    ``{ ` `     `  `        ``// 'sp' used for space and 'st' used for star ` `        ``int sp = n / 2, st = 1; ` `         `  `        ``// Outer for loop prints number of lines ` `        ``for (int i = 1; i <= n; i++)  ` `        ``{ ` `            ``for (int j = 1; j <= sp; j++) ` `            ``{ ` `                ``Console.Write(" "); ` `            ``} ` `            ``int count = 1; ` `            ``for (int k = 1; k <= st; k++)  ` `            ``{ ` `                ``if (k % 2 == 0) ` `                    ``Console.Write("*"); ` `                ``else ` `                    ``Console.Write(count++); ` `            ``} ` `             `  `                     ``Console.WriteLine(); ` `             `  `            ``if (i <= n / 2) ` `            ``{ ` `                ``// Before reaching to half after ` `                ``// every line space is decreased ` `                ``// by 1 and star is increased by 2 ` `                ``sp = sp - 1; ` `                ``st = st + 2; ` `            ``} ` `            ``else ` `            ``{ ` `                ``// After reaching to half ` `                ``// space is increased by 1 ` `                ``// and star is decreased by 2 ` `                ``sp = sp + 1; ` `                ``st = st - 2; ` `            ``} ` `        ``} ` `    ``} ` ` `  `    ``// Driver Code ` `    ``public static void Main() ` `    ``{ ` `        ``int n = 5; ` `        ``Pattern p = new Pattern(); ` `        ``p.display(n); ` `    ``} ` `} ` `//This code is contributed by vt_m. `

## PHP

 ` `

Output:

```  1
1*2
1*2*3
1*2
1
```

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