How do I convert an integer to binary in JavaScript?

To convert an integer to binary in JavaScript, divide the integer by 2 and store the remainder.

Example

Following is the code −

function convertDecimalToBinary(value) {
   var binaryValues = [];
   var counter = 0;
   while (value > 0) {
      binaryValues[counter++] = parseInt(value % 2);
      value = parseInt(value / 2);
   }
   for (var j = counter - 1; j >= 0; j--)
      process.stdout.write(binaryValues[j] + "");
}
convertDecimalToBinary(5);

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo255.js.

Output

This will produce the following output on console −

PS C:\Users\Amit\javascript-code> node demo255.js
101