Python program to convert decimal to binary number
Given a decimal number as input, the task is to write a Python program to convert the given decimal number into an equivalent binary number.
Examples :Â
Input : 7
Output :111
Input :10
Output :1010
Method #1: Recursive solution
DecimalToBinary(num):
if num >= 1:
DecimalToBinary(num // 2)
print num % 2
Below is the implementation of the above recursive solution:Â
Python3
def DecimalToBinary(num):
if num > = 1 :
DecimalToBinary(num / / 2 )
print (num % 2 , end = '')
if __name__ = = '__main__' :
dec_val = 24
DecimalToBinary(dec_val)
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Method #2: Decimal to binary using in-built functionÂ
Python3
def decimalToBinary(n):
return bin (n).replace( "0b" , "")
if __name__ = = '__main__' :
print (decimalToBinary( 8 ))
print (decimalToBinary( 18 ))
print (decimalToBinary( 7 ))
|
Method #3:Without in-built function
Python3
def decimalToBinary(n):
return "{0:b}" . format ( int (n))
if __name__ = = '__main__' :
print (decimalToBinary( 8 ))
print (decimalToBinary( 18 ))
print (decimalToBinary( 7 ))
|
Quick Ninja Method: One Line Code to Convert Decimal to Binary with user input
orÂ
Python3
decNum = 4785
print ( bin (decNum)[ 2 :])
decNum1 = 10
print ( bin (decNum1)[ 2 :])
decNum2 = 345
print ( bin (decNum2)[ 2 :])
|
Output
1001010110001
1010
101011001
Using the bitwise shift operator >>.
Python3
def dec2bin(number: int ):
ans = ""
if ( number = = 0 ):
return 0
while ( number ):
ans + = str (number& 1 )
number = number >> 1
ans = ans[:: - 1 ]
return ans
def main():
number = 60
print (f "The binary of the number {number} is {dec2bin(number)}" )
if __name__ = = "__main__" :
main()
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Output
The binary of the number 60 is 111100
Using built-in format method:
Another approach that is using the built-in format() function. This approach involves converting the decimal number to an integer and then using the format() function with the ‘b’ format specifier to convert it to a binary string. The binary string can then be printed or stored for later use.
Here is an example of how this approach can be used:
Python
def decimal_to_binary(decimal_num):
binary_str = format ( int (decimal_num), 'b' )
return binary_str
print (decimal_to_binary( 7 ))
print (decimal_to_binary( 10 ))
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Last Updated :
01 Mar, 2024
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