Function for converting hex and decimal

Question

What would the function be for when the user inputs, it converts the input to both hex and binary?

The algorithm for converting from decimal to binary is this:

Take your decimal number and determine the remainder if you divide that number by two. The remainder is now the bit in your ONES (2^0) place. Hint: the modulo operator % will give you the REMAINDER of a division. For example, 5%2 is 1 because the remainder of dividing 5 by 2 is 1. 4%2 is 0, because there is no remainder.
Now, we're going to update your decimal number: divide the decimal number and round down to get your NEW decimal number

var hexLetters = "0123456789ABCDEF".split("");


var decimalNum = Number(window.prompt("Enter a decimal number to convert"));


var binaryNum= "";
*  binary conversion *


console.log("The number " + decimalNum + " in binary is: ")
console.log(binaryNum);


var hexNum = "";
*binary conversion*

/************************************* */

console.log("The number " + decimalNum + " in hexadecimal is: ")
console.log(hexNum);

What would the function be for when the user inputs, it converts the input to both hex and binary

Please include your best attempt to solve this and tell us what problems you are having. — jarmod, Feb 23 '21 at 19:03
Why not just call `parseInt(value, base)` and transform it into decimal from any base? — Mr. Polywhirl, Feb 23 '21 at 19:06

score 0 · Answer 1 · answered Feb 23 '21 at 19:12

0

You can create a function to convert a hex number to binary:

function hexToBin(hex){
return ("00000000" + (parseInt(hex, 16)).toString(2)).substr(-8);

}

answered Feb 23 '21 at 19:12

Adnan Aslam

96
5

score 0 · Answer 2 · answered Feb 23 '21 at 19:17

To play in safe the user must choose the target from (Hex, Binary, decimal) to (Hex, Binary, decimal) to know the right function to use

 // 1. Convert to Binary

    function convertToBinary(number) {
        let bin = 0;
        let rem, i = 1, step = 1;
        while (number != 0) {
            rem = number % 2;
            console.log(
                `Step ${step++}: ${number}/2, Remainder = ${rem}, Quotient = ${parseInt(number/2)}`
            );
            number = parseInt(number / 2);
            bin = bin + rem * i;
            i = i * 10;
        }
        console.log(`Binary: ${bin}`);
    }
    
    convertToBinary(2);

    
    // 2. Convert to Hex 

    function hex2bin(hex){
        return (parseInt(hex, 16).toString(2)).padStart(8, '0');
    }
    function convertHexToBinary(hex) {
      var result = "";
    hex.split(" ").forEach(sting => {
      result += hex2bin(sting)
    })
    console.log(result)
    }
    
    convertHexToBinary('2AB');

Hex answer credit for https://stackoverflow.com/a/45054052/14292804

Binary answer credit for https://www.programiz.com/javascript/examples/decimal-binary#:~:text=The%20parseInt()%20method%20is,decimal%20number%20to%20binary%20number.

Does not seem to be working, the binary and hexcode are the same each time. — Fredom304, Feb 23 '21 at 20:18
it's working my friend I test it in 10 cases, maybe you made something — Tawfeeq Amro, Feb 23 '21 at 20:57

Function for converting hex and decimal

2 Answers2