Solved the two questions of the JavaScript

1. Check the number fraction is proper or improper
2. Change the characters in String like a with z, b with y and c with x

Author: Devendra Parmar

ChangeTheCharactersInAString.js

@@ -0,0 +1,16 @@
+// Write a JavaScript program to change the characters (lower case) in a string where a turns into z, b turns into y, c turns into x, ..., n turns into m, m turns into n, ..., z turns into a.
+
+const prompt = require("prompt-sync")();
+
+console.log("Enter The String Here : ");
+var str = prompt();
+
+var result = [];
+
+for (let i = 0; i < str.length; i++) {
+  var charOrder = str.charCodeAt(i) - "a".charCodeAt(0);
+  var changeChar = 25 - charOrder + "a".charCodeAt(0);
+  result.push(String.fromCharCode(changeChar));
+}
+
+console.log(result.join(""));

CheckTheNumberFractionIsProperOrImproper.js

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+// Write a JavaScript program to check whether a given fraction is proper or not.
+
+// Note: There are two types of common fractions, proper or improper. When the numerator and the denominator are both positive, the fraction is called proper if the numerator is less than the denominator, and improper otherwise.
+
+const prompt = require("prompt-sync")();
+
+console.log("Enter Array Size : ");
+var size = parseInt(prompt());
+
+var arr = [];
+
+console.log("Enter Array Elements : ");
+for (let i = 0; i < size; i++) {
+  console.log(`[${i}] : `);
+  var elem = parseInt(prompt());
+  arr.push(elem);
+}
+
+var div = Math.abs(arr[0] / arr[1]);
+
+if (div < 1) {
+  console.log("Proper Fraction!");
+} else {
+  console.log("Improper Fraction!");
+}