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 :
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:
Python3
# Function to convert decimal number# to binary using recursiondef DecimalToBinary(num): if num >= 1: DecimalToBinary(num // 2) print(num % 2, end = '')# Driver Codeif __name__ == '__main__': # decimal value dec_val = 24 # Calling function DecimalToBinary(dec_val) |
011000
Method #2: Decimal to binary using in-built function
Python3
# Python program to convert decimal to binary # Function to convert Decimal number# to Binary numberdef decimalToBinary(n): return bin(n).replace("0b", "") # Driver codeif __name__ == '__main__': print(decimalToBinary(8)) print(decimalToBinary(18)) print(decimalToBinary(7)) |
1000 10010 111
Method #3:Without in-built function
Python3
# Python program to convert decimal to binary # Function to convert Decimal number# to Binary numberdef decimalToBinary(n): return "{0:b}".format(int(n)) # Driver codeif __name__ == '__main__': print(decimalToBinary(8)) print(decimalToBinary(18)) print(decimalToBinary(7)) |
1000 10010 111
Quick Ninja Method: One Line Code to Convert Decimal to Binary with user input
Python3
# Quick Ninja One line Codeprint(bin(4785)[2:]) |
1001010110001
or
Python3
# Use this for user input#decNum = int(input("Enter any Decimal Number: "))decNum = 4785print(bin(decNum)[2:])decNum1 = 10print(bin(decNum1)[2:])decNum2 = 345print(bin(decNum2)[2:]) |
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 ansdef main(): number = 60 print(f"The binary of the number {number} is {dec2bin(number)}")# driver codeif __name__ == "__main__": main() |
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_strprint(decimal_to_binary(7)) # prints 111print(decimal_to_binary(10)) # prints 1010#This code is contributed by Edula Vinay Kumar Reddy |
111 1010
