From a66ed834f96cc0e8b8adb07dd43177f9d5de27ac Mon Sep 17 00:00:00 2001
From: Durga Prasad <65699516+dpgaharwal@users.noreply.github.com>
Date: Tue, 7 Jan 2025 14:49:25 +0530
Subject: [PATCH] Handled NaN validation in Weather Calculator (#1977)

---
 Calculators/Weather-Calculator/script.js | 32 ++++++++++++++----------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/Calculators/Weather-Calculator/script.js b/Calculators/Weather-Calculator/script.js
index c5b2e6256..8c72243e2 100644
--- a/Calculators/Weather-Calculator/script.js
+++ b/Calculators/Weather-Calculator/script.js
@@ -1,8 +1,19 @@
-document.getElementById('calculate').addEventListener('click', function() {
-    const temperature = parseFloat(document.getElementById('temperature').value);
-    const humidity = parseFloat(document.getElementById('humidity').value);
-    const windSpeed = parseFloat(document.getElementById('windSpeed').value);
-    
+document.getElementById('calculate').addEventListener('click', function () {
+    const temperatureInput = document.getElementById('temperature').value;
+    const humidityInput = document.getElementById('humidity').value;
+    const windSpeedInput = document.getElementById('windSpeed').value;
+
+    // Check for empty inputs
+    if (!temperatureInput || !humidityInput || !windSpeedInput) {
+        alert("Please fill in all the fields: Temperature, Humidity, and Wind Speed.");
+        return;
+    }
+
+    const temperature = parseFloat(temperatureInput);
+    const humidity = parseFloat(humidityInput);
+    const windSpeed = parseFloat(windSpeedInput);
+
+    // Perform calculations and display results
     const results = `
         <p> Temperature Conversion: ${convertTemperature(temperature)} °F </p>
         <p> Wind Chill: ${findWindChill(temperature, windSpeed)} °C </p>
@@ -10,17 +21,15 @@ document.getElementById('calculate').addEventListener('click', function() {
         <p> Heat Index: ${findHeatIndex(temperature, humidity)} °C </p>
         <p> Human Thermal Comfort: ${findHumanThermalComfort(temperature, humidity, windSpeed)} </p>
     `;
-    
+
     document.getElementById('results').innerHTML = results;
 });
 
 function convertTemperature(celsius) {
-
-    return (celsius * 9/5) + 32;         
+    return (celsius * 9/5) + 32;
 }
 
 function findWindChill(temperature, windSpeed) {
-    
     if (temperature > 10 || windSpeed < 4.8) {
         return "❌";
     }
@@ -28,16 +37,14 @@ function findWindChill(temperature, windSpeed) {
 }
 
 function findDewPoint(temperature, humidity) {
-    
     const a = 17.27;
     const b = 237.7;
     const alpha = ((a * temperature) / (b + temperature)) + Math.log(humidity / 100);
     const dewPoint = (b * alpha) / (a - alpha);
-    return dewPoint.toFixed(2);       
+    return dewPoint.toFixed(2);
 }
 
 function findHeatIndex(temperature, humidity) {
-
     const T = temperature;
     const R = humidity;
     const HI = -8.78469475556 + 1.61139411 * T + 2.33854883889 * R + -0.14611605 * T * R + -0.012308094 * Math.pow(T, 2) + -0.0164248277778 * Math.pow(R, 2) + 0.002211732 * Math.pow(T, 2) * R + 0.00072546 * T * Math.pow(R, 2) + -0.000003582 * Math.pow(T, 2) * Math.pow(R, 2);
@@ -45,7 +52,6 @@ function findHeatIndex(temperature, humidity) {
 }
 
 function findHumanThermalComfort(temperature, humidity, windSpeed) {
-    
     const THI = temperature - ((0.55 - (0.55 * (humidity / 100))) * (temperature - 14.5));
     if (THI < 15) {
         return "Cold";