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How to convert a number to a different number system in Python

How to convert a number to a different number system in Python.

Here is a step-by-step tutorial on how to convert a number to a different number system using Python.

Step 1: Understanding Number Systems​

Before we start, let's have a brief understanding of number systems. In computer science, we commonly work with four number systems:

  1. Decimal (base 10): The number system we use in everyday life, with digits ranging from 0 to 9.
  2. Binary (base 2): The number system with only two digits, 0 and 1.
  3. Octal (base 8): The number system with digits ranging from 0 to 7.
  4. Hexadecimal (base 16): The number system with digits ranging from 0 to 9 and letters A to F.

Step 2: Converting Decimal to Binary​

To convert a decimal number to binary, we can use the bin() function in Python. Here's an example:

decimal_number = 10
binary_number = bin(decimal_number)[2:]  # Remove the '0b' prefix
print(binary_number)  # Output: 1010

Step 3: Converting Decimal to Octal​

To convert a decimal number to octal, we can use the oct() function in Python. Here's an example:

decimal_number = 10
octal_number = oct(decimal_number)[2:]  # Remove the '0o' prefix
print(octal_number)  # Output: 12

Step 4: Converting Decimal to Hexadecimal​

To convert a decimal number to hexadecimal, we can use the hex() function in Python. Here's an example:

decimal_number = 10
hexadecimal_number = hex(decimal_number)[2:]  # Remove the '0x' prefix
print(hexadecimal_number)  # Output: a

Step 5: Converting Binary to Decimal​

To convert a binary number to decimal, we can use the int() function in Python. Here's an example:

binary_number = '1010'
decimal_number = int(binary_number, 2)
print(decimal_number)  # Output: 10

Step 6: Converting Octal to Decimal​

To convert an octal number to decimal, we can use the int() function in Python. Here's an example:

octal_number = '12'
decimal_number = int(octal_number, 8)
print(decimal_number)  # Output: 10

Step 7: Converting Hexadecimal to Decimal​

To convert a hexadecimal number to decimal, we can use the int() function in Python. Here's an example:

hexadecimal_number = 'a'
decimal_number = int(hexadecimal_number, 16)
print(decimal_number)  # Output: 10

Conclusion​

In this tutorial, we learned how to convert numbers between different number systems using Python. We covered conversions from decimal to binary, octal, and hexadecimal, as well as conversions from binary, octal, and hexadecimal back to decimal. Now you can easily convert numbers between different number systems in your Python programs!