2 binary strings. The function will multiply these two arguments and return the result as a binary string

Question

And Write a JS function that takes 2 arguments: 2 binary strings. The function will multiply these two arguments and return the result as a binary string.
    Note_: A binary string is a sequence of bytes, such as `"1001001100"`
   input= ("01011001010101", "11011111010101"),
     output= 100110111101101011110111001

For Example :   
str1 = `"10"`  
str2 = `"100"`  
Output = `"1000"`


 '''
    function raj(n1,n2){
    var n1=n1.split("")
    var n2=n2.split("")
    var mul=[]
    for(var i=0;i<n1.length;i++){
     for(var ;j<n2.length;j--){
      var k=n1[i]*n2[j]
     mul.push(k)
     }
    }
     return mul
    }
    var x=raj("10","100")
    console.log(x)
  '''

You posted an assignment and some code. What is the problem or question? — takendarkk, May 12 '20 at 15:16
Actually i i want to multiply two binary string like if is multiply without converting into string because when i convert it in the integer then multiply and again convert it into binary the output is different ..please help me out — rupesh raj, May 12 '20 at 15:23

score 2 · Answer 1 · edited May 12 '20 at 22:02

2

Here is a function that multiplies two binary strings and returns the output as a binary string:

function multiplyBinaryStrings (binaryString1, binaryString2){
    let int1 = parseInt(binaryString1, 2)
    let int2 = parseInt(binaryString2, 2)
    return (int1 * int2).toString(2)
}

edited May 12 '20 at 22:02

Mike

3,855
5
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answered May 12 '20 at 15:25

FC1927DK

21
4

when we run this code the output is 1.0011011110110101e+26 for the input "01011001010101","11011111010101" .... we just multiply these two string without converting into binary this is the issue. – rupesh raj May 12 '20 at 15:52

smith john · Answer 2 · 2023-05-05T01:45:05.100

1

Use BigInt in js

var output = (BigInt(parseInt("01011001010101",2)) * BigInt(parseInt("11011111010101",2))).toString(2);
// --> 100110111101101011110111001

edited May 05 '23 at 01:45

answered Oct 14 '21 at 04:24

smith john

33
9

Good answer, but please update the link to point to the English docs. – Kostas Mouratidis Oct 14 '21 at 06:00

2 binary strings. The function will multiply these two arguments and return the result as a binary string

2 Answers2