Decimal to Binary Conversion using Python

In this post, you will learn how to convert a decimal into an equivalent binary number using Python. Here, I have mentioned two ways to do that:

1.Using loops

Step 1. Divide the integer by 2, while noting the remainder.

    while(decimal > 0):  
        rem = decimal % 2

Step 2. Then, append this remainder to a list. then, divide the quotient again by 2.

        binary_num_list.append(rem)
        decimal = decimal // 2

Step 3. Like this, keep dividing each successive quotient by 2 until you get a quotient of zero.

Step 4. After this, we reverse the order of the list to get the binary representation of

binary_num_list.reverse()    
print("Binary Equivalent is: ")
for i in binary_num_list:
    print(i, end=" ")  

Here's the full code:

User_input=int(input("Enter a number: "))

binary_num_list=[]

def decimal_to_binary(decimal):
        
    while(decimal > 0):
        
        rem = decimal % 2
        
        binary_num_list.append(rem)
        
        decimal = decimal // 2
        
    binary_num_list.reverse()
    
    print("Binary Equivalent is: ")
    
    for i in binary_num_list:
        
        print(i, end=" ")

2.Using recursive function

A recursive function is a function that calls itself during its execution something. For this, we have defined a function and taken a decimal number as an input and converted it to an equivalent binary number.

User_input = int(input("Enter a number: "))

print("Binary Equivalent is: ")

def decimal_to_binary(decimal):
            
    if decimal > 1:
        
        decimal_to_binary(decimal // 2)        
        
    print(decimal % 2, end = " ")

Personally I think this conversion is better and much more efficient than the first one.