The task is to toggle the first bit and last bit of a given number in python.

**Toggling: **

A toggling operation changes the value of a bit from 0 to 1 and from 1 to 0.

**Examples:**

**Example1:**

**Input:**

Given Number =12

**Output:**

The Number after toggling the first bit and last bit of a given number{ 12 } = 5

**Example2:**

**Input:**

Given Number =4

**Output:**

The Number after toggling the first bit and last bit of a given number{ 4 } = 1

## Program to Toggle First and Last Bits of a Number in Python

Below are the ways to toggle the first bit and last bit of a given number in python:

### Method #1: Using Right Shift (>>)Operator (Static Input)

**Approach:**

- Give the number as static input and store it in a variable.
- Pass the given number as an argument to the
**takeLastandFirstsetbits**function. - Create a function to say
**takeLastandFirstsetbits**which takes the given number as an argument. - Apply the
**or(|)**operator to the given number and given_numb >> 1(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 2(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 4(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 8(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 16(Right Shift) and store it in the same variable. - Add 1 to the given number and right shift the result by 1 and store it in another variable.
- Return the above result +1.
- Pass the given number as an argument to the
**toggleFirstandLastbits**function. - Create a function to say
**toggleFirstandLastbits**which takes the given number as an argument and returns the number after toggling the first and last bits of a given number. - Check if the given number is equal to 1 using the if conditional statement.
- If the statement is true, then return 0.
- Return the Xor result of the given number and takeLastandFirstsetbits(gven_numb).
- Print the number after toggling the first bit and last bit of a given number.
- The Exit of the Program.

**Below is the implementation:**

# Create a function to say takeLastandFirstsetbits which takes the given number as an # argument. def takeLastandFirstsetbits(gven_numb): # Apply the or(|) operator to the given number and given_numb >> 1(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 1 # Apply the or(|) operator to the given number and given_numb >> 2(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 2 # Apply the or(|) operator to the given number and given_numb >> 4(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 4 # Apply the or(|) operator to the given number and given_numb >> 8(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 8 # Apply the or(|) operator to the given number and given_numb >> 16(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 16 # Add 1 to the given number and right shift the result by 1 and store it in another # variable. p = (gven_numb + 1) >> 1 # Return the above result +1. return (p + 1) # Create a function to say toggleFirstandLastbits which takes the given number as an # argument and returns the number after toggling the first and last bits of a given number. def toggleFirstandLastbits(gven_numb): # Check if the given number is equal to 1 using the if conditional statement. if (gven_numb == 1): # If the statement is true, then return 0. return 0 # Return the Xor result of the given number and takeLastandFirstsetbits(gven_numb). return gven_numb ^ takeLastandFirstsetbits(gven_numb) # Give the number as static input and store it in a variable. # Pass the given number as an argument to the takeLastandFirstsetbits function. # Pass the given number as an argument to the toggleFirstandLastbits function. gven_numb = 12 # Print the number after toggling the first bit and last bit of a given number. print("The Number after toggling the first bit and last bit of a given number{", gven_numb, "} = ", toggleFirstandLastbits( gven_numb))

**Output:**

The Number after toggling the first bit and last bit of a given number{ 12 } = 5

### Method #2: Using Right Shift (>>)Operator (User Input)

**Approach:**

- Give the number as user input using the int(input()) function and store it in a variable.
- Pass the given number as an argument to the
**takeLastandFirstsetbits**function. - Create a function to say
**takeLastandFirstsetbits**which takes the given number as an argument. - Apply the
**or(|)**operator to the given number and given_numb >> 1(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 2(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 4(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 8(Right Shift) and store it in the same variable. - Apply the
**or(|)**operator to the given number and given_numb >> 16(Right Shift) and store it in the same variable. - Add 1 to the given number and right shift the result by 1 and store it in another variable.
- Return the above result +1.
- Pass the given number as an argument to the
**toggleFirstandLastbits**function. - Create a function to say
**toggleFirstandLastbits**which takes the given number as an argument and returns the number after toggling the first and last bits of a given number. - Check if the given number is equal to 1 using the if conditional statement.
- If the statement is true, then return 0.
- Return the Xor result of the given number and takeLastandFirstsetbits(gven_numb).
- Print the number after toggling the first bit and last bit of a given number.
- The Exit of the Program.

**Below is the implementation:**

# Create a function to say takeLastandFirstsetbits which takes the given number as an # argument. def takeLastandFirstsetbits(gven_numb): # Apply the or(|) operator to the given number and given_numb >> 1(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 1 # Apply the or(|) operator to the given number and given_numb >> 2(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 2 # Apply the or(|) operator to the given number and given_numb >> 4(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 4 # Apply the or(|) operator to the given number and given_numb >> 8(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 8 # Apply the or(|) operator to the given number and given_numb >> 16(Right Shift) and # store it in the same variable. gven_numb = gven_numb | gven_numb >> 16 # Add 1 to the given number and right shift the result by 1 and store it in another # variable. p = (gven_numb + 1) >> 1 # Return the above result +1. return (p + 1) # Create a function to say toggleFirstandLastbits which takes the given number as an # argument and returns the number after toggling the first and last bits of a given number. def toggleFirstandLastbits(gven_numb): # Check if the given number is equal to 1 using the if conditional statement. if (gven_numb == 1): # If the statement is true, then return 0. return 0 # Return the Xor result of the given number and takeLastandFirstsetbits(gven_numb). return gven_numb ^ takeLastandFirstsetbits(gven_numb) # Give the number as user input using the int(input()) function and store it in a variable. gven_numb = int(input("Enter some random number = ")) # Pass the given number as an argument to the takeLastandFirstsetbits function. # Pass the given number as an argument to the toggleFirstandLastbits function. # Print the number after toggling the first bit and last bit of a given number. print("The Number after toggling the first bit and last bit of a given number{", gven_numb, "} = ", toggleFirstandLastbits( gven_numb))

**Output:**

Enter some random number = 4 The Number after toggling the first bit and last bit of a given number{ 4 } = 1