# Check whether the number formed by concatenating two numbers is a perfect square or not

Given two numbers a and b and the task is to check whether the concatenation of a and b is a perfect square or not.

Examples:

Input: a = 1, b = 21
Output: Yes
121 = 11 × 11, is a perfect square.

Input: a = 100, b = 100
Output: No
100100 is not a perfect square.

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

Approach: Initialize the number as strings initially and concatenate them. Convert the string to a number using Integer.valueOf() function. Once the string has been converted to a number, check if the number is a perfect square or not.

Below is the implementation of the above approach.

## C++

 `// C++ program to check if the ` `// concatenation of two numbers ` `// is a perfect square or not ` `#include ` `using` `namespace` `std; ` ` `  `// Function to check if ` `// the concatenation is ` `// a perfect square ` `void` `checkSquare(string s1, string s2) ` `{ ` ` `  `    ``// Function to convert  ` `    ``// concatenation of  ` `    ``// strings to a number ` `    ``int` `c = stoi(s1 + s2); ` ` `  `    ``// square root of number ` `    ``int` `d = ``sqrt``(c); ` ` `  `    ``// check if it is a ` `    ``// perfect square ` `    ``if` `(d * d == c)  ` `    ``{ ` `        ``cout << ``"Yes"``; ` `    ``} ` `    ``else`  `    ``{ ` `        ``cout << ``"No"``; ` `    ``} ` `} ` ` `  `// Driver Code ` `int` `main() ` `{ ` `    ``string s1 = ``"12"``; ` `    ``string s2 = ``"1"``; ` ` `  `    ``checkSquare(s1, s2); ` `     `  `    ``return` `0; ` `} `

## Java

 `// Java program to check if the ` `// concatenation of two numbers ` `// is a perfect square or not ` `import` `java.lang.*; ` `class` `GFG { ` ` `  `    ``// Function to check if the concatenation is ` `    ``// a perfect square ` `    ``static` `void` `checkSquare(String s1, String s2) ` `    ``{ ` ` `  `        ``// Function to convert concatenation ` `        ``// of strings to a number ` `        ``int` `c = Integer.valueOf(s1 + s2); ` ` `  `        ``// square root of number ` `        ``int` `d = (``int``)Math.sqrt(c); ` ` `  `        ``// check if it is a perfect square ` `        ``if` `(d * d == c) { ` `            ``System.out.println(``"Yes"``); ` `        ``} ` `        ``else` `{ ` `            ``System.out.println(``"No"``); ` `        ``} ` `    ``} ` ` `  `    ``// Driver Code ` `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` `        ``String s1 = ``"12"``; ` `        ``String s2 = ``"1"``; ` ` `  `        ``checkSquare(s1, s2); ` `    ``} ` `} `

## Python 3

 `# Python 3 program to check if the ` `# concatenation of two numbers ` `# is a perfect square or not ` `import` `math ` ` `  `# Function to check if the concatenation  ` `# is a perfect square ` `def` `checkSquare(s1, s2): ` ` `  `    ``# Function to convert concatenation of  ` `    ``# strings to a number ` `    ``c ``=` `int``(s1 ``+` `s2) ` ` `  `    ``# square root of number ` `    ``d ``=` `math.sqrt(c) ` ` `  `    ``# check if it is a perfect square ` `    ``if` `(d ``*` `d ``=``=` `c) : ` `        ``print``(``"Yes"``) ` `     `  `    ``else``: ` `        ``print``(``"No"``) ` ` `  `# Driver Code ` `if` `__name__ ``=``=` `"__main__"``: ` `     `  `    ``s1 ``=` `"12"` `    ``s2 ``=` `"1"` ` `  `    ``checkSquare(s1, s2) ` ` `  `# This code is contributed by ita_c `

## C#

 `// C# program to check if the  ` `// concatenation of two numbers  ` `// is a perfect square or not  ` `using` `System;  ` `public` `class` `GFG {  ` ` `  `    ``// Function to check if the concatenation is  ` `    ``// a perfect square  ` `    ``static` `void` `checkSquare(String s1, String s2)  ` `    ``{  ` ` `  `        ``// Function to convert concatenation  ` `        ``// of strings to a number  ` `        ``int` `c = Convert.ToInt32(s1 + s2 );``//int.ValueOf(s1 + s2);  ` ` `  `        ``// square root of number  ` `        ``int` `d = (``int``)Math.Sqrt(c);  ` ` `  `        ``// check if it is a perfect square  ` `        ``if` `(d * d == c) {  ` `            ``Console.WriteLine(``"Yes"``);  ` `        ``}  ` `        ``else` `{  ` `            ``Console.WriteLine(``"No"``);  ` `        ``}  ` `    ``}  ` ` `  `    ``// Driver Code  ` `    ``public` `static` `void` `Main()  ` `    ``{  ` `        ``String s1 = ``"12"``;  ` `        ``String s2 = ``"1"``;  ` ` `  `        ``checkSquare(s1, s2);  ` `    ``}  ` `}  ` ` `  `// This code is contributed by PrinciRaj1992 `

## PHP

 ` `

Output:

```Yes
```

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