Added check for no input and 0 input (#261)

Issue Link: #204

Accidentally committed codes of two different issues to this PR. I have
submitted another PR for the other
issue(#197).
Please accept both. Thank You

Please go through all the Screenshots. 


![image](https://github.com/Git21221/JS-beginner-projects/assets/69238138/5ce0e81c-6ee1-4384-bb23-9a79e073add4)

![image](https://github.com/Git21221/JS-beginner-projects/assets/69238138/a85c9639-062f-4503-81ad-bb5081fb666d)

![image](https://github.com/Git21221/JS-beginner-projects/assets/69238138/c79ac9df-ba65-415b-b30c-b0e01ec82f1d)

GitHub Card/js/script.js

@@ -8,21 +8,34 @@ const usernameInput = document.querySelector("#username");
 
 
 
-async function profile(name="shouryasinghrathore") {
-
-    let quotes = await fetch(`https://api.github.com/users/${name}`)
-    let apiInfo = await quotes.json();
-    console.log(apiInfo)
-    image.setAttribute('src', apiInfo.avatar_url);
-    newname.innerHTML =apiInfo.login;
-    console.log(apiInfo.login)
-    following.innerHTML = apiInfo.following;
-    followers.innerHTML = apiInfo.followers;
-    id.innerHTML = apiInfo.id;
-
+async function profile(name = "shouryasinghrathore") {
+    try {
+        let response = await fetch(`https://api.github.com/users/${name}`);
+
+        if (response.status === 404) {
+            profile();
+            document.getElementById("inputValue").value = "";
+            alert("Enter Valid Username");
+        } else if (response.ok) {
+            let apiInfo = await response.json();
+            console.log(apiInfo);
+            image.setAttribute('src', apiInfo.avatar_url);
+            newname.innerHTML = apiInfo.login;
+            console.log(apiInfo.login);
+            following.innerHTML = apiInfo.following;
+            followers.innerHTML = apiInfo.followers;
+            id.innerHTML = apiInfo.id;
+        } else {
+            console.error("Error fetching user data");
+            alert("Error fetching user data");
+        }
+    } catch (error) {
+        console.error("An error occurred:", error);
+    }
 }
 
 
+
 function processInput() {
     let inputValue = document.getElementById("inputValue").value;
     if (inputValue.trim() !== "") {

Random Password Generator/js/script.js

@@ -12,6 +12,10 @@ document.addEventListener("DOMContentLoaded", function () {
 
     function generatePassword() {
         const length = parseInt(passwordLengthInput.value);
+        if(!length) {
+            alert("Please enter a valid password length.");
+            return;
+        }
         const includeUppercase = includeUppercaseCheckbox.checked;
         const includeLowercase = includeLowercaseCheckbox.checked;
         const includeNumbers = includeNumbersCheckbox.checked;