[Shreyash]: Added code to print table of power of 2

Author: shreyashdj

Repetition Problems/While Loop/PowerOfTwo.js

@@ -0,0 +1,17 @@
+/*
+    Write a program that takes a command-line argument n and prints table
+    of the powers of 2 that are less than or equal to 2^n till 256 is reached..
+*/
+
+const prompt = require("prompt-sync")();
+console.log();
+let n = parseInt(prompt(" Enter power : "))
+console.log(" Priniting the table of 2 till 2^n or 256 :");
+let result;
+let i = 1;
+while (result != 256 && i <= n) {
+    result = Math.pow(2, i);
+    console.log(" 2^" + i + ": " + result);
+    i++;
+}
+console.log();