Added logic for Sum of All Numbers

javascript/beginner/sum-of-all-numbers_hp250497.js

@@ -0,0 +1,43 @@
+const readline = require("readline");
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+});
+
+const sum_all=(arr)=>{
+    try{
+        let i,sum=0;
+        let min=Math.min(...arr);
+        let max=Math.max(...arr);
+        for(i=min;i<=max;i++){
+            sum+=i;
+        }
+        return sum;
+    }
+    catch(err){
+        return(err);
+    }
+
+}
+
+function question(theQuestion) {
+    return new Promise(resolve => rl.question(theQuestion, answ => resolve(parseInt(answ))))
+}
+
+(async ()=>{
+    try{
+        var arr=[];
+        arr.push(await question("Enter 1st number  "));
+        arr.push(await question("Enter 2nd number  "));
+
+        console.log("Sum of the array is: "+sum_all(arr));
+        process.exit();
+    }
+    catch(err){
+        console.log(err)
+        process.exit(1);
+    }
+
+
+})();