my-first-prime-sive/sive.js

const readline = require("readline");
const { stdin: input, stdout: output } = require('node:process');


let primes = []

const isPrime = num => {
    for(let i = 2, s = Math.sqrt(num); i <= s; i++) {
        if(num % i === 0) return false;
    }
    return num > 1;
} //the only part taken from stackoverflow lmao...

const rl = readline.createInterface({ input, output });

rl.question('Sive to: ', (siveTo) => {
    siveTo = Number(siveTo)


    for (var i = 1; i < siveTo; i++) {
        if (isPrime(i)) {
                primes.push(i)
        }
    }

    if (isPrime(siveTo)) {
        primes.push(siveTo)
    }

    console.table(primes)

    rl.close()
})