Add sive.js

sive.js

@@ -0,0 +1,31 @@
+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)
+        }
+    }
+
+    primes.push(siveTo)
+
+    console.table(primes)
+
+    rl.close()
+})