Decimal number is converted into binary by dividing the number successively by 2 and printing the remainder in reverse order.

## Source Code

```
# Function to print binary number using recursion
def convertToBinary(n):
if n > 1:
convertToBinary(n//2)
print(n % 2,end = '')
# decimal number
dec = 34
convertToBinary(dec)
print()
```

**Output**

100010

You can change the variable `dec` in the above program and run it to test out for other values.

This program works only for whole numbers. It doesn't work for real numbers having fractional values such as: `25.5`, `45.64` and so on. We encourage you to create Python program that converts decimal numbers to binary for all real numbers on your own.