Given a non-negative number n and two values l and r. The problem is to set the bits in the range l to r in the binary representation of n, i.e, to unset bits from the rightmost lth bit to the rightmost r-th bit.

Constraint: 1 <= l <= r <= number of bits in the binary representation of n.

**Examples :**

Input : n = 17, l = 2, r = 3 Output : 23 (17)_{10}= (10001)_{2}(23)_{10}= (10111)_{2}The bits in the range 2 to 3 in the binary representation of 17 are set. Input : n = 50, l = 2, r = 5 Output : 62

Approach: Following are the steps:

1. Find a number 'range' that has all set bits in given range. And all other bits of this number are 0. range = (((1 << (l - 1)) - 1) ^ ((1 << (r)) - 1)); 2. Now, perform "n = n | range". This will set the bits in the range from l to r in n.

## C++

// the given range

#include

using namespace std;

// function to toggle bits in the given range

int setallbitgivenrange(int n, int l, int r)

{

// calculating a number ‘range’ having set

// bits in the range from l to r and all other

// bits as 0 (or unset).

int range = (((1 << (l - 1)) - 1) ^
((1 << (r)) - 1));
return (n | range);
}
// Driver code
int main()
{
int n = 17, l = 2, r = 3;
cout << setallbitgivenrange(n, l, r);
return 0;
}

## Java

// the given range

import java.util.*;

class GFG

{

// function to toggle bits in the

// given range

static int setallbitgivenrange(int n,

int l, int r)

{

// calculating a number ‘range’

// having set bits in the range

// from l to r and all other

// bits as 0 (or unset).

int range = (((1 << (l - 1)) - 1) ^
((1 << (r)) - 1));
return (n | range);
}
// Driver code
public static void main(String[] args)
{
int n = 17, l = 2, r = 3;
System.out.println(setallbitgivenrange(
n, l, r));
}
}
// This code is contributed by Sam007.

## Python3

# bits in the given range

# Function to toggle bits

# in the given range

def setallbitgivenrange(n, l, r):

# calculating a number ‘range’

# having set bits in the range

# from l to r and all other

# bits as 0 (or unset).

range = (((1 << (l - 1)) - 1) ^
((1 << (r)) - 1))
return (n | range)
# Driver code
n, l, r = 17, 2, 3
print(setallbitgivenrange(n, l, r))
# This code is contributed by Anant Agarwal.

## C#

// bits in the given range

using System;

class GFG

{

// function to toggle bits

// in the given range

static int setallbitgivenrange(int n, int l, int r)

{

// calculating a number ‘range’

// having set bits in the range

// from l to r and all other

// bits as 0 (or unset).

int range = (((1 << (l - 1)) - 1) ^
((1 << (r)) - 1));
return (n | range);
}
// Driver code
static void Main()
{
int n = 17, l = 2, r = 3;
Console.Write(setallbitgivenrange(n, l, r));
}
}
// This code is contributed by Sam007

## PHP

**Output :**

23

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