Python program for decimal to binary conversion
Decimal to binary conversion in Python
Here, in this page we will discuss the program for Decimal to binary conversion in python. A decimal number is a standard representation of integers or non-integers, decimal numbers are also called as numbers with base 10. Whereas in binary number system numbers are with base 10 and shows representation by 0 and 1.
Methods discussed
- Method 1: Binary Bits stored in Array
- Method 2: Using mathematical operations to generate binary equivalent.
Algorithm ( Method 1 )
- Initialize a empty array as binaryArray
- while input number is greater then 0
- Append 1 if unit digit of num is odd else append 0
- Assign half the value of num to num
- Print all the values of binaryArray
Python Code
Run
def convertBinary(num):
binaryArray = []
while num>0:
binaryArray.append(num%2)
num = num//2
for j in binaryArray:
print(j, end="")
decimal_num = 21
convertBinary(decimal_num)
Output
Binary of 21 is : 10101
Algorithm ( Method 2 )
- Initialize variables binary, i, rem and assign 0, 1, 0 respectively
- While input number is greater then zero run he loop
- rem equals to divisibility of input by 2
- num equals to half of num
- Add rem * i to binary
- Multiply i by 10
- return binary
Python Code
Run
def convertBinary(num):
binary = 0
i, rem = 1, 0
while num != 0:
rem = num % 2
num = num // 2
binary += rem * i
i *= 10
return binary
decimal_num = 21
print("Binary of", decimal_num, "is : ", end="")
print(convertBinary(decimal_num))
Output
Binary of 21 is : 10101
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code by jay@7 milky
n=21
l=[]
r=[]
while n>=1:
l.append(n)
n=n//2
for i in range(len(l)):
if l[i]%2==0:
r.append(0)
else:
r.append(1)
s=””
for i in r:
s+=str(i)
print(s)