# Convert binary string to string in javascript

I have a Binary string and I want to convert it into a string format. here is the function,

```let stringConversion = (n) => {
let convertToString = n.toString();
console.log(convertToString);
};

stringConversion(00000000000000000000000000001011);
```

The output I want is “00000000000000000000000000001011” but it is giving me “521”

In JS a number token that starts with a `0` and does not contain a `9` is read in octal base. So the interpreter convert your number into a decal base, and you obtain a different number: `01011 => (1011)8 = (521)10`.

If the token stats with `0b` it is read as binary string also, so you could just append it to your number: `0b1011 => (1011)2 = (11)10`.

Now if you want to convert a bit string, well, actually it should be literally a string. You should do something like `stringConversion('00000000000000000000000000001011');`

I wrote some code that helps you to find the right way to encode/decode a binary string into a UNSIGNED (theoretically) infinite number. If you want to keep sign, you should provide some more informations to the binary string, like for example a fixed length or pretend that the first bit is the sign.

```function binary2number(bitStr) {
// initialize the result to 0
let result = 0;

for (let bit of bitStr) {
// shift the current result one bit to the left
result <<= 1;
result += !!parseInt(bit);
}

return result;
};

function number2binary(num, minBitLength=0) {
// converting the number to a string in base 2
let result = num.toString(2)

// concatenate the missing '0' up to minBitLength
while (result.length < minBitLength) {
result = '0' + result;
}
return result;
}

console.log('00000000000000000000000000001011 (in 8 base) is interpreted as' ,
00000000000000000000000000001011, '(in 10 base)');

console.log('00000000000000000000000000001011 =>',
binary2number('00000000000000000000000000001011'));

console.log('11 =>', number2binary(11, 32), '(32 bits = unsigned int commonly)');

console.log('11 =>', number2binary(11), '(for short)');```

Now, this is the conventional way to represent a binary integer, but if your bit string should represent something different, a float for example, the code would drastically change. You could also define your own way to parse that string. There are also many underlying assumptions, which I will not dig into (like endian, and other finite memory representation stuffs).