Python: Reverse the binary representation of an integer and convert it into an integer

Last update on May 24 2025 10:46:47 (UTC/GMT +8 hours)

Reverse Binary and Convert

Write a Python program to reverse the binary representation of a given number and convert the reversed binary number into an integer.

Sample Solution:

Python Code:

# Define a function 'test' that takes an integer 'n' as input.
def test(n):
    # Convert 'n' to binary using 'bin(n)', reverse the binary representation, and remove the '0b' prefix.
    reversed_binary = bin(n)[::-1][:-2]
    # Convert the reversed binary representation back to an integer using 'int(reversed_binary, 2)'.
    return int(reversed_binary, 2)

# Test case 1
n1 = 13
print("Original number: ", n1)
print("Reverse the binary representation of the said integer and convert it into an integer:\n", test(n1))

# Test case 2
n2 = 145
print("\nOriginal number: ", n2)
print("Reverse the binary representation of the said integer and convert it into an integer:\n", test(n2))

# Test case 3
n3 = 1342
print("\nOriginal number: ", n3)
print("Reverse the binary representation of the said integer and convert it into an integer:\n", test(n3))

Sample Output:

Original number:  13
Reverse the binary representation of the said integer and convert it into an integer:
 11
Original number:  145
Reverse the binary representation of the said integer and convert it into an integer:
 137
Original number:  1342
Reverse the binary representation of the said integer and convert it into an integer:
 997

Explanation:

Here is a breakdown of the above Python code:

• test Function:
• The "test()" function takes an integer 'n' as input.
• It converts 'n' to its binary representation using bin(n).
• The binary representation is reversed using [::-1] and the prefix '0b' is removed by [:-2].
• The reversed binary representation is then converted back to an integer using int(reversed_binary, 2).

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to convert a number to binary, reverse the binary string, and convert it back to an integer.
• Write a Python program to reverse the binary representation of an integer and output the corresponding decimal value.
• Write a Python program to compute the reversed binary of a number and return its integer equivalent.
• Write a Python program to transform an integer by reversing its binary representation and converting the result to a new integer.

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