CODEWITHSUNDEEP
pythonpython-2.7binarydecimalbit
AKS
AKS

Reputation: 17316

Python printing binary value and its decimal form

Python 2.6/2.7

I have the following program.

print 0b10

def p_m(x):
    print x

p_m(bin(2))

Output:

2
0b10

What I wanted to print in p_m() is 2 (the decimal value) of "0b10" which is what I'm passing to p_m() as first argument and getting this value "0b10" in variable x and just printing that x.

Why print x inside the function is NOT working like the first line in the program?

What should I do in p_m()'s print statement to print the value of "0b10" as 2.

Upvotes: 2

Views: 6323

Answers (3)

Marlon Abeykoon
Marlon Abeykoon

Reputation: 12465

print 0b10 gives 2.

This is because all the numbers are stored in python as binary.

bin(2) is a string. So it gives you the binary value.

You can use print int('0b10', 2). Here 2 means the base and '0b10' is the binary you want to convert. 0b part of 0b10 is not mandatory since int() already knows it converts it to base 2. Documentation says,

The default base is 10. The allowed values are 0 and 2-36. Base-2, -8, and -16 literals can be optionally prefixed with 0b/0B, 0o/0O/0, or 0x/0X, as with integer literals in code.

Upvotes: 1

Ohad Eytan
Ohad Eytan

Reputation: 8464

Convert the string 0b10 back to int using 2 base parameter:

def p_m(x):
    print int(x, 2)

Upvotes: 2

Asish M.
Asish M.

Reputation: 2647

0b10 is an int. bin(2) is '0b10' which is a string. You'd have to print int('0b10', 2) to get it to print 2

Upvotes: 2

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