Add calculator and weather API scripts in JavaScript and Python

JavaScript/js calculator/calc.js

@@ -0,0 +1,50 @@
+const readline = require("readline");
+
+const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout,
+});
+
+function calculator() {
+    rl.question("Enter operation (add, subtract, multiply, divide): ", (operation) => {
+        rl.question("Enter the first number: ", (first) => {
+            const num1 = parseFloat(first);
+
+            rl.question("Enter the second number: ", (second) => {
+                const num2 = parseFloat(second);
+
+                let result;
+
+                switch (operation.toLowerCase()) {
+                    case "add":
+                        result = num1 + num2;
+                        break;
+                    case "subtract":
+                        result = num1 - num2;
+                        break;
+                    case "multiply":
+                        result = num1 * num2;
+                        break;
+                    case "divide":
+                        if (num2 !== 0) {
+                            result = num1 / num2;
+                        } else {
+                            console.error("Error: Division by zero is not allowed.");
+                            rl.close();
+                            return;
+                        }
+                        break;
+                    default:
+                        console.error("Invalid operation. Please enter add, subtract, multiply, or divide.");
+                        rl.close();
+                        return;
+                }
+
+                console.log(`Result: ${result}`);
+                rl.close();
+            });
+        });
+    });
+}
+
+calculator();