Print ‘K’th least significant bit of a number

A number N is given. We need to print its ‘K’th Least Significant Bit.
Examples :

```Input : num = 10, k = 4
Output : 1
Explanation : Binary Representation
of 10 is 1010. 4th LSB is 1.

Input : num = 16, k = 3
Output : 0
Explanation : Binary Representation
of 16 is 10000. 3rd LSB is 0.```
Recommended Practice

We can easily solve this problem by following steps :

1. Shift the number ‘1’ (K-1) times left.
2. This will yield a number with all unset bits but the ‘K’th bit. Now, we’ll perform logical AND of the shifted number with given number.
3. All bits except the ‘K’th bit will yield 0, and ‘K’th bit will depend on the number. This is because, 1 AND 1 is 1. 0 AND 1 is 0.

C++

 `// CPP code to print 'K'th LSB ` `#include ` `using` `namespace` `std; ` ` `  `//Function returns 1 if set, 0 if not ` `bool` `LSB(``int` `num, ``int` `K) ` `{ ` `    ``return` `(num & (1 << (K-1))); ` `} ` ` `  `//Driver code ` `int` `main()  ` `{ ` `    ``int` `num = 10, K = 4; ` `     `  `    ``//Function call ` `    ``cout << LSB(num, K); ` `     `  `    ``return` `0; ` `} `

java

 `// java code to print 'K'th LSB ` `import` `java .io.*; ` ` `  `class` `GFG { ` `     `  `    ``// Function returns 1 if set, 0 if not ` `    ``static` `boolean` `LSB(``int` `num, ``int` `K) ` `    ``{ ` `        ``boolean` `x = (num & (``1` `<< (K-``1``))) != ``0``; ` `        ``return` `(x); ` `    ``} ` `     `  `    ``// Driver code ` `     ``public` `static` `void` `main(String[] args)  ` `    ``{ ` `        ``int` `num = ``10``, K = ``4``; ` `         `  `        ``//Function call ` `        ``if``(LSB(num, K))  ` `            ``System.out.println(``"1"``) ; ` `         `  `        ``else` `            ``System.out.println(``"0"``); ` `    ``}  ` `} ` ` `  `// This code is contributed by Anuj_67 `

Python3

 `# Python code to print 'K'th LSB ` ` `  `# Function returns 1 if set, 0 if not ` `def` `LSB(num, K): ` `    ``return` `bool``(num & (``1` `<< (K ``-` `1``) )) ` ` `  `# Driver code ` `num, k ``=` `10``, ``4` ` `  `res ``=` `LSB(num, k) ` `if` `res : ` `    ``print``(``1``) ` `else``: ` `    ``print``(``0``) ` ` `  `#This code is contributed by Sachin Bisht `

C#

 `// C# code to print 'K'th LSB ` `using` `System; ` ` `  `class` `GFG { ` `     `  `    ``// Function returns 1 if set, 0 if not ` `    ``static` `bool` `LSB(``int` `num, ``int` `K) ` `    ``{ ` `        ``bool` `x = (num & (1 << (K-1))) != 0; ` `        ``return` `(x); ` `    ``} ` `     `  `    ``// Driver code ` `    ``static` `void` `Main()  ` `    ``{ ` `        ``int` `num = 10, K = 4; ` `         `  `        ``//Function call ` `        ``if``(LSB(num, K))  ` `            ``Console.Write(``"1"``) ; ` `         `  `        ``else` `            ``Console.Write(``"0"``); ` `    ``}  ` `} ` ` `  `// This code is contributed by Anuj_67 `

PHP

 ` `

Javascript

 ``

Output :

`1`

Time Complexity: O(1)

Auxiliary Space: O(1)

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