Question

How to convert a number to any base in JavaScript

Answer 1

function toBase(n, base) {
    const digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

    if (base < 2 || base > 36) {
        throw new Error("Base must be between 2 and 36");
    }

    if (n === 0) {
        return "0";
    }

    let result = "";

    while (n > 0) {
        const remainder = n % base;
        result += digits[remainder];
        n = Math.floor(n / base);
    }

    return result.split("").reverse().join("");
}

// Main program
try {
    const number = 255;

    console.log(`${number} in base 2  = ${toBase(number, 2)}`);
    console.log(`${number} in base 8  = ${toBase(number, 8)}`);
    console.log(`${number} in base 16 = ${toBase(number, 16)}`);
    console.log(`${number} in base 36 = ${toBase(number, 36)}`);
} catch (err) {
    console.error("Error:", err.message);
}



/*
run:

255 in base 2  = 11111111
255 in base 8  = 377
255 in base 16 = FF
255 in base 36 = 73

*/

 

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