Python Program to Convert Decimal to Binary, Octal and Hexadecimal

To understand this example, you should have knowledge of following Python programming topics:

Python Programming Built-in Functions

Decimal system is the most widely used number system. But computer only understands binary. Binary, octal and hexadecimal number systems are closely related and we may require to convert decimal into these systems. Decimal system is base 10 (ten symbols, 0-9, are used to represent a number) and similarly, binary is base 2, octal is base 8 and hexadecimal is base 16.
A number with the prefix '0b' is considered binary, '0o' is considered octal and '0x' as hexadecimal. For example:

60 = 0b11100 = 0o74 = 0x3c

Source Code

# Python program to convert decimal number into binary, octal and hexadecimal number system

# Take decimal number from user
dec = int(input("Enter an integer: "))

print("The decimal value of",dec,"is:")
print(bin(dec),"in binary.")
print(oct(dec),"in octal.")
print(hex(dec),"in hexadecimal.")

Output

Enter an integer: 344
The decimal value of 344 is:
0b101011000 in binary.
0o530 in octal.
0x158 in hexadecimal.

In this program, we have used built-in functions bin(), oct() and hex() to convert the given decimal number into respective number systems. These functions take an integer (in decimal) and return a string.