# Check if a given number is Pronic

The numbers that can be arranged to form a rectangle are called Rectangular Numbers (also known as Pronic numbers). The first few Pronic numbers are:
0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462 . . . . . .

Pronic number is a number which is the product of two consecutive integers, that is, a number n is a product of x and (x+1). The task is to check and print Pronic Numbers in a range.

Examples :

```Input  : 6
Output : Pronic Number
Explanation: 6 = 2 * 3 i.e 6 is a product
of two consecutive integers 2 and 3.

Input :56
Output :Pronic Number
Explanation: 56 = 7 * 8 i.e 56 is a product
of two consecutive integers 7 and 8.

Input  : 8
Output : Not a Pronic Number
Explanation: 8 = 2 * 4 i.e 8 is a product of
2 and 4 which are not consecutive integers.
```

## C/C++

 `// C/C++ program to check  ` `// if a number is pronic ` `#include ` `#include ` ` `  `using` `namespace` `std; ` ` `  `// function to check  ` `// Pronic Number ` `bool` `checkPronic(``int` `x) ` `{ ` ` `  `    ``for` `(``int` `i = 0;  ` `             ``i <= (``int``)(``sqrt``(x));  ` `             ``i++) ` ` `  `        ``// Checking Pronic Number  ` `        ``// by multiplying consecutive ` `        ``// numbers ` `        ``if` `(x == i * (i + 1))  ` `        ``return` `true``; ` ` `  `    ``return` `false``; ` `} ` ` `  `// Driver Code ` `int` `main(``void``) ` `{ ` `    ``// Printing Pronic Numbers ` `    ``// upto 200 ` `    ``for` `(``int` `i = 0; i <= 200; i++)  ` `        ``if` `(checkPronic(i)) ` `            ``cout << i << ``" "``; ` `     `  `    ``return` `0; ` `} ` `// This code is contributed ` `// by Nikita Tiwari. `

## Java

 `// Java program to check and ` `// Print Pronic Number upto 200 ` `import` `java.io.*; ` `import` `java.util.*; ` `import` `java.math.*; ` ` `  `class` `GFG  ` `{ ` ` `  `    ``// function to check Pronic Number ` `    ``static` `boolean` `checkPronic(``int` `x) ` `    ``{ ` `        ``for` `(``int` `i = ``0``;  ` `             ``i <= (``int``)(Math.sqrt(x));  ` `             ``i++)  ` `             `  `            ``// Checking Pronic Number  ` `            ``// by multiplying consecutive ` `            ``// numbers ` `            ``if` `(x == i * (i + ``1``))  ` `                ``return` `true``; ` `         `  `        ``return` `false``; ` `    ``} ` ` `  `    ``// Driver Code ` `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` `        ``// Printing Pronic  ` `        ``// Numbers upto 200 ` `        ``for` `(``int` `i = ``0``; i <= ``200``; i++)  ` `            ``if` `(checkPronic(i)) ` `                ``System.out.print(i + ``" "``);      ` `    ``} ` `} ` ` `  `// This code is contributed  ` `// by Nikita Tiwari `

## Python

 `# Python program to check  ` `# and print Pronic Numbers  ` `# upto 200 ` `import` `math ` ` `  `# function to check  ` `# Pronic Number ` `def` `checkPronic (x) : ` ` `  `    ``i ``=` `0` `    ``while` `( i <``=` `(``int``)(math.sqrt(x)) ) : ` `         `  `        ``# Checking Pronic Number  ` `        ``# by multiplying consecutive  ` `        ``# numbers ` `        ``if` `( x ``=``=` `i ``*` `(i ``+` `1``)) : ` `            ``return` `True` `        ``i ``=` `i ``+` `1` ` `  `    ``return` `False` ` `  `# Driver Code ` ` `  `# Printing Pronic ` `# Numbers upto 200 ` `i ``=` `0` `while` `(i <``=` `200` `) : ` `    ``if` `checkPronic(i) : ` `        ``print` `i, ` `    ``i ``=` `i ``+` `1` ` `  `# This code is contributed  ` `# by Nikita Tiwari. `

## C#

 `// Java program to check and ` `// Print Pronic Number upto 200 ` `using` `System; ` ` `  `class` `GFG ` `{ ` ` `  `    ``// function to check ` `    ``// Pronic Number ` `    ``static` `bool` `checkPronic(``int` `x) ` `    ``{ ` `        ``for` `(``int` `i = 0;  ` `                 ``i <= (``int``)(Math.Sqrt(x));  ` `                 ``i++)  ` `             `  `            ``// Checking Pronic Number by  ` `            ``// multiplying consecutive numbers ` `            ``if` `(x == i * (i + 1))  ` `                ``return` `true``; ` `         `  `        ``return` `false``; ` `    ``} ` ` `  `    ``// Driver Code ` `    ``public` `static` `void` `Main() ` `    ``{ ` `        ``// Printing Pronic  ` `        ``// Numbers upto 200 ` `        ``for` `(``int` `i = 0; i <= 200; i++)  ` `            ``if` `(checkPronic(i)) ` `                ``Console.Write(i + ``" "``);  ` `    ``} ` `} ` ` `  `// This code is contributed by vt_m. `

## PHP

 ` `

Output :

```0 2 6 12 20 30 42 56 72 90 110 132 156 182
```

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