# Conditionally assign a value without using conditional and arithmetic operators

• Difficulty Level : Easy
• Last Updated : 12 Oct, 2021

Given 4 integers a, b, y, and x, where x can assume the values of either 0 or 1 only. The following question is asked:

```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 (+, -, *, /).

Attention reader! All those who say programming isn't for kids, just haven't met the right mentors yet. Join the  Demo Class for First Step to Coding Coursespecifically designed for students of class 8 to 12.

The students will get to learn more about the world of programming in these free classes which will definitely help them in making a wise career choice in the future.

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 1st index respectively. Then store value to ‘y’ by taking ‘x’ as an 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`

## Python3

 `# Python3 program to assign value to y``# according to value of x` `# Driver Code``a ``=` `5``b ``=` `10``x ``=` `1``y ``=` `0` `if` `((x & ``1``) !``=` `0``):``    ``y ``=` `b``else``:``    ``y ``=` `a` `print``(``"Value assigned to 'y' is "``, y)` `# This code is contributed by ab2127`

## 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`

This article is contributed by Sahil Chhabra (akku). If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.