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Conditionally assign a value without using conditional and arithmetic operators
• Difficulty Level : Easy
• Last Updated : 05 May, 2021

Given 4 integers a, b, y, and x, where x can only either 0 and 1 only. The ask is as follows:

```If 'x' is 0,
Assign value 'a' to variable 'y'
Else (If 'x' is 1)
Assign value 'b' to variable 'y'.```

Note: – You are not allowed to use any conditional operator (including the ternary operator) or any arithmetic operator (+, -, *, /).

Examples :

```Input :  a = 5 , b = 10, x = 1
Output :  y = 10

Input : a = 5, b = 10 , x = 0
Output :  y = 5```

Solution 1:

An Idea is to simply store both ‘a’ and  ‘b’ in an array  at 0th and 1th index respectively. Then store value to ‘y’ by taking ‘x’ as index.

Below is the implementation of the above approach:

## C++

 `// C/C++ program to assign value to y according``// to value of x` `#include ``using` `namespace` `std;` `// Function to assign value to y according``// to value of x``int` `assignValue(``int` `a, ``int` `b, ``int` `x)``{``    ``int` `y;``    ``int` `arr;` `    ``// Store both values in an array``    ``// value 'a' at 0th index``    ``arr = a;` `    ``// Value 'b' at 1th index``    ``arr = b;` `    ``// Assign value to 'y' taking 'x' as index``    ``y = arr[x];` `    ``return` `y;``}` `// Driver code``int` `main()``{``    ``int` `a = 5;``    ``int` `b = 10;``    ``int` `x = 0;` `    ``cout << ``"Value assigned to 'y' is "``         ``<< assignValue(a, b, x);``    ``return` `0;``}`

## Java

 `// Java program to assign value to y according``// to value of x` `public` `class` `GFG {``    ``static` `int` `assignValue(``int` `a, ``int` `b, ``int` `x)``    ``{``        ``int` `y;``        ``int` `arr[] = ``new` `int``[``2``];` `        ``// Store both values in an array``        ``// value 'a' at 0th index``        ``arr[``0``] = a;` `        ``// Value 'b' at 1th index``        ``arr[``1``] = b;` `        ``// Assign value to 'y' taking 'x' as index``        ``y = arr[x];` `        ``return` `y;``    ``}` `    ``// Driver Method``    ``public` `static` `void` `main(String[] args)``    ``{``        ``int` `a = ``5``;``        ``int` `b = ``10``;``        ``int` `x = ``0``;` `        ``System.out.println(``"Value assigned to 'y' is "``                           ``+ assignValue(a, b, x));``    ``}``}`

## Python

 `# Python 3 program to assign value to``# y according to value of x` `# Function to assign value to y``# according to value of x`  `def` `assignValue(a, b, x):` `    ``arr ``=` `[``0``] ``*` `2` `    ``# Store both values in an array``    ``# value 'a' at 0th index``    ``arr[``0``] ``=` `a` `    ``# Value 'b' at 1th index``    ``arr[``1``] ``=` `b` `    ``# Assign value to 'y' taking 'x'``    ``# as index``    ``y ``=` `arr[x]` `    ``return` `y`  `# Driver code``if` `__name__ ``=``=` `"__main__"``:` `    ``a ``=` `5``    ``b ``=` `10``    ``x ``=` `0` `    ``print``(``"Value assigned to 'y' is"``,``          ``assignValue(a, b, x))` `# This code is contributed by ita_c`

## C#

 `// C# program to assign value to y according``// to value of x``using` `System;` `public` `class` `GFG {` `    ``static` `int` `assignValue(``int` `a, ``int` `b, ``int` `x)``    ``{``        ``int` `y;``        ``int``[] arr = ``new` `int``;` `        ``// Store both values in an array``        ``// value 'a' at 0th index``        ``arr = a;` `        ``// Value 'b' at 1th index``        ``arr = b;` `        ``// Assign value to 'y' taking 'x'``        ``// as index``        ``y = arr[x];` `        ``return` `y;``    ``}` `    ``// Driver Code``    ``public` `static` `void` `Main()``    ``{``        ``int` `a = 5;``        ``int` `b = 10;``        ``int` `x = 0;` `        ``Console.Write(``"Value assigned to "``                      ``+ ``"'y' is "` `+ assignValue(a, b, x));``    ``}``}` `// This code is contributed by nitin mittal.`

## PHP

 ``

## Javascript

 ``
Output
`Value assigned to 'y' is 5`

Solution 2:

Using bitwise AND operator.

## C++

 `// C/C++ program to assign value to y according``// to value of x` `#include ``using` `namespace` `std;` `// Driver Code``int` `main()``{``    ``int` `a = 5;``    ``int` `b = 10;``    ``int` `x = 1;``    ``int` `y;` `    ``if` `(x & 1)``        ``y = b;``    ``else``        ``y = a;``    ``cout << ``"Value assigned to 'y' is "` `<< y << endl;``    ``return` `0;``}`

## Java

 `// Java program to assign value to y according``// to value of x``import` `java.io.*;``class` `GFG``{` `  ``// Driver Code``  ``public` `static` `void` `main (String[] args)``  ``{   ``    ``int` `a = ``5``;``    ``int` `b = ``10``;``    ``int` `x = ``1``;``    ``int` `y;``    ``if` `((x & ``1``) != ``0``)``      ``y = b;``    ``else``      ``y = a;``    ``System.out.println(``"Value assigned to 'y' is "` `+ y);``  ``}``}` `// This code is contributed by avanitrachhadiya2155`

## C#

 `// C# program to assign value to y according``// to value of x``using` `System;``public` `class` `GFG``{` `  ``// Driver Code``  ``static` `public` `void` `Main ()``  ``{` `    ``int` `a = 5;``    ``int` `b = 10;``    ``int` `x = 1;``    ``int` `y;``    ``if` `((x & 1) != 0)``      ``y = b;``    ``else``      ``y = a;``    ``Console.WriteLine(``"Value assigned to 'y' is "` `+ y);``  ``}``}` `// This code is contributed by rag2127`

## Javascript

 ``
Output
`Value assigned to 'y' is 10`

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