In the previous article, we have discussed Python Program to Toggle First and Last Bits of a Number
The task is to toggle all the bits of a given number except the first and last bits 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 = 8
Output:
The Number after toggling all the bits of a given number{ 8 } except the first and last bits = 14
Example2:
Input:
Given Number = 15
Output:
The Number after toggling all the bits of a given number{ 15 } except the first and last bits = 9
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Program to Toggle Bits of a Number Except First and Last bits in Python
Below are the ways to toggle all the bits of a given number except the first and last bits 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 setallmidlebits function.
- Create a function to say setallmidlebits 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.
- Right shift the given number by 1 and store it in another variable.
- Return the Xor value of the above result and 1.
- Pass the given number as an argument to the toglemidlebits function.
- Create a function to say toglemidlebits which takes the given number as an argument and returns the number after toggling all the bits of a given number except the first and last bits.
- Check if the given number is equal to 1 using the if conditional statement.
- If the statement is true, then return 1.
- Return the Xor result of the given number and setallmidlebits(gven_numb).
- Print the number after toggling all the bits of a given number except the first and last bits.
- The Exit of the Program.
Below is the implementation:
# Create a function to say setallmidlebits which takes the given number as an
# argument.
def setallmidlebits(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
# Right shift the given number by 1 and store it in another variable.
p = (gven_numb >> 1)
# Return the Xor value of the above result and 1.
return (p ^ 1)
# Create a function to say toglemidlebits which takes the given number as an
# argument and returns the number after toggling all the bits of a given number except the
# first and last bits.
def toglemidlebits(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 1.
return 1
# Return the Xor result of the given number and setallmidlebits(gven_numb).
return gven_numb ^ setallmidlebits(gven_numb)
# Give the number as static input and store it in a variable.
gven_numb = 8
# Pass the given number as an argument to the setallmidlebits function.
# Pass the given number as an argument to the toglemidlebits function.
# Print the number after toggling all the bits of a given number except the
# first and last bits.
print("The Number after toggling all the bits of a given number{", gven_numb,
"} except the first and last bits = ", toglemidlebits(gven_numb))
Output:
The Number after toggling all the bits of a given number{ 8 } except the first and last bits = 14
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 setallmidlebits function.
- Create a function to say setallmidlebits 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.
- Right shift the given number by 1 and store it in another variable.
- Return the Xor value of the above result and 1.
- Pass the given number as an argument to the toglemidlebits function.
- Create a function to say toglemidlebits which takes the given number as an argument and returns the number after toggling all the bits of a given number except the first and last bits.
- Check if the given number is equal to 1 using the if conditional statement.
- If the statement is true, then return 1.
- Return the Xor result of the given number and setallmidlebits(gven_numb).
- Print the number after toggling all the bits of a given number except the first and last bits.
- The Exit of the Program.
Below is the implementation:
# Create a function to say setallmidlebits which takes the given number as an
# argument.
def setallmidlebits(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
# Right shift the given number by 1 and store it in another variable.
p = (gven_numb >> 1)
# Return the Xor value of the above result and 1.
return (p ^ 1)
# Create a function to say toglemidlebits which takes the given number as an
# argument and returns the number after toggling all the bits of a given number except the
# first and last bits.
def toglemidlebits(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 1.
return 1
# Return the Xor result of the given number and setallmidlebits(gven_numb).
return gven_numb ^ setallmidlebits(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 setallmidlebits function.
# Pass the given number as an argument to the toglemidlebits function.
# Print the number after toggling all the bits of a given number except the
# first and last bits.
print("The Number after toggling all the bits of a given number{", gven_numb,
"} except the first and last bits = ", toglemidlebits(gven_numb))
Output:
Enter some random number = 15
The Number after toggling all the bits of a given number{ 15 } except the first and last bits = 9
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