Question

How to convert a decimal to binary using recursion in Python

Answer 1

def decimal_to_binary(n):
    if n > 1:
        decimal_to_binary(n//2)
    print(n % 2, end='')
 
 
decimal = 41
 
decimal_to_binary(decimal)
 
'''
run:
 
101001
 
'''

 

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Answer 2

def decimal_to_binary(n):
    if n < 0:
        return 'decimal < 0'
    elif n == 0:
        return '0'
    else:
        return decimal_to_binary(n//2) + str(n % 2)
 
 
decimal = 41
 
s = decimal_to_binary(decimal)
 
print(s)
 
'''
run:
 
0101001
 
'''

 

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