[Shreyash]: Added code to check entered number is prime or not

Author: shreyashdj

Repetition Problems/For Loop/PrimeNumber.js

@@ -0,0 +1,20 @@
+/*
+    Write program that takes  input and determines if the number is a prime.
+*/
+
+const prompt = require("prompt-sync")();
+console.log();
+let num = parseInt(prompt(" Enter the number : "))
+let count = 0;
+for (let i = 2; i <= num / 2; i++) {
+    if (num % i == 0) {
+        count += 1;
+        break;
+    }
+}
+if (count == 0 && num > 1) {
+    console.log(" " + num + " is a Prime Number \n");
+}
+else {
+    console.log(" " + num + " is not a Prime number \n");
+}