# Add two binary numbers
**URL:** https://discourse.julialang.org/t/add-two-binary-numbers/44556
**Category:** New to Julia
**Created:** [August 8, 2020, 9:04am UTC](https://discourse.julialang.org/t/add-two-binary-numbers/44556 "2020-08-08T09:04:07Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Fuad\_Sami](https://discourse.julialang.org/u/Fuad_Sami)
#### Post date: [August 8, 2020, 9:04am UTC](https://discourse.julialang.org/t/add-two-binary-numbers/44556/1 "2020-08-08T09:04:07Z")
i need to add two binary number.
in the first place how i display a binary number in julia ? i try a lot things but doesn’t work
like , `parse(Int,"111",2) or Int(0b110111)`
in python the code is like that
```julia
def addBinary(self, a, b) -> str:
x,y = int(a,2),int(b,2) # **how i can do that in julia ??**
if a=='0' : return b
if b=='0' : return a
while y:
#x, y = x ^ y, (x & y) << 1
result = x^y #XOR =(1+0)=1 , 1+1=0
carry = (x&y) << 1 # just in 1+1 = 1 ,all zero # **in julia they have a and ?**
print(result , carry)
x , y = result , carry
return bin(x)[2:]
```
---
### Author:  [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)
#### Post date: [August 8, 2020, 11:16am UTC](https://discourse.julialang.org/t/add-two-binary-numbers/44556/2 "2020-08-08T11:16:47Z")
> [@Fuad\_Sami](#):
>
> i need to add two binary number.
How is it represented? If you are using `0b11` etc to construct it, that will just use the applicable `<:Unsigned` type, which of course has `+` defined in `Base`, so there is no need to do anything special.
See [Integers and Floating-Point Numbers · The Julia Language](https://docs.julialang.org/en/v1/manual/integers-and-floating-point-numbers/)
---
### Author:  [@Henrique\_Becker](https://discourse.julialang.org/u/Henrique_Becker)
#### Post date: [August 8, 2020, 1:13pm UTC](https://discourse.julialang.org/t/add-two-binary-numbers/44556/3 "2020-08-08T13:13:29Z")
`parse` and `Int` have nothing to do with displaying. Every number is a binary number, the syntax `0b110111` (base 2) make easy you pass the number `55` (base 10) to the program while looking at its binary representation, but it is a number like any other and it is represented in binary inside the computer.
Are you talking about strings representing binary numbers with characters `'0'` and `'1'`? To make them an `Int` you can use `parse(Int, "01011", base = 2)`. I do not know, however, if there is a standard library function in `Julia` that does transform the number in a `String` of `'0'` and `'1'` (base 2). The `Prinf.@sprintf` does not accept any format identifier that prints the number base 2.
---
### Author:  [@anon37204545](https://discourse.julialang.org/u/anon37204545)
#### Post date: [August 8, 2020, 2:33pm UTC](https://discourse.julialang.org/t/add-two-binary-numbers/44556/4 "2020-08-08T14:33:32Z")
> [@Fuad\_Sami](#):
>
> in python the code is like that
>
> ```julia
> def addBinary(self, a, b) -> str:
>
> x,y = int(a,2),int(b,2) # **how i can do that in julia ??**
> if a=='0' : return b
> if b=='0' : return a
> while y:
> #x, y = x ^ y, (x & y) << 1
> result = x^y #XOR =(1+0)=1 , 1+1=0
> carry = (x&y) << 1 # just in 1+1 = 1 ,all zero # **in julia they have a and ?**
> print(result , carry)
> x , y = result , carry
> return bin(x)[2:]
>
> ```
In Julia the code is like this:
```julia
julia> 0b1 + 0b11
0x04
```
In case you want to see it in the true binary representation, use `bitstring(n)`:
```julia
julia> bitstring(0b1 + 0b11)
"00000100"
```