Decimal to Binary 🟡

Write a function that returns the binary value (as string) for a positive integer decimal number

• The decimal number system is a number system that represents a number with a base of 10 and uses 10 digits:

  • 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

• The binary number system is a number system with base 2 in which numbers are represented only by two digits:

  • 0 and 1.

There are different methods of converting numbers from decimal to binary. One possibility is successively divide the decimal number by 2 (until the quotient is zero) and use the remainders to build the binary number.

See the example bellow using the decimal number 30:

Number	Integer division by 2	Remainder
30	15	0
15	7	1
7	3	1
3	1	1
1	0	1

The binary number is written using the Remainders from downwards to upwards, in the above example: 11110

See another example:

Useful Links

• Decimal and binary

• Modulus operator

• List

• Python operators

• If statements & Conditionals

• Functions

Content

• Write your code: Decimal to Binary
• Solution: Decimal to Binary