diff --git a/index.js b/index.js
index 3bb4d07..48c88b3 100644
--- a/index.js
+++ b/index.js
@@ -4,7 +4,129 @@
  * Depending on the operation, either add up all of the numbers or subtract all of the numbers, from left to right.
  * @returns {number} The result of either adding all numbers or subtracting all numbers, depending on the arguments added to the command line.
  */
-function calculator() {}
+
+function calculator() {
+    //
+    //console.log(process.argv)
+
+
+     add2Num =  parseInt(`${process.argv[3]}`) + parseInt(`${process.argv[4]}`);
+    
+    if (process.argv[2] === "plus" && process.argv.length === parseInt(4)) {
+
+        return add2Num;
+    }
+
+   console.log(`Adding two numbers:${add2Num}`)
+
+             
+    sub2Num= parseInt(`${process.argv[3]}`)- parseInt(`${process.argv[4]}`);
+       
+ if(process.argv[2] === "minus" && process.argv.length <= parseInt(4)){
+      
+            
+                return sub2Num;
+        }
+console.log(`Subtracting two numbers : ${sub2Num}`)
+        
+
+       
+       
+
+        
+
+         
+    addMultipleNum = parseInt(`${process.argv[3]}`) + parseInt(`${process.argv[4]}`)+
+ parseInt(`${process.argv[5]}`) + parseInt(`${process.argv[6]}`)+ parseInt(`${process.argv[7]}`);
+       
+ 
+ if(process.argv[2] === "plus" && process.argv.length === parseInt(7)){
+                return addMultipleNum;
+         }
+
+console.log(`Adding multiple numbers: ${addMultipleNum}`)
+
+       
+      
+       
+   
+        
+     
+        
+        
+    subMultipleNum = parseInt(`${process.argv[3]}`) - parseInt(`${process.argv[4]}`) -
+parseInt(`${process.argv[5]}`) - parseInt(`${process.argv[6]}`) - parseInt(`${process.argv[7]}`);
+      
+        if(process.argv[2] === "minus" && process.argv.length === parseInt(7)){
+
+                return subMultipleNum
+        }
+console.log(`Subtracting multiplenumbers : ${subMultipleNum}`)
+
+  div2Num= parseInt(`${process.argv[3]}`) / parseInt(`${process.argv[4]}`);
+
+
+   if (process.argv[2] === "modulo"||"divide" && process.argv.length===parseInt(0 )); {
+   
+      console.log((`Invalid operation: Nan, ${process.argv[2]}`));
+   
+   }
+                   
+}             
+calculator()
+
+
+
+
+                
+             
+
+
+
+//WAS WORKING BUT STOPPED WORKING 
+// function add2Num(num1, num2) {
+//    return num1 + num2;
+//  }
+ 
+//  function sub(num1, num2) {
+//    return num1 - num2;
+//  }
+//  function addMultNum(num1, num2, num3,num4,num5) {
+//    return num1 + num2+num3+num4+num5;
+//  }
+//  function subMultNum(num1, num2, num3,num4,num5) {
+//    return num1 - num2 - num3 -num4 - num5;
+//  }
+//  function div() {
+//    return `Invalid operation:` + process.argv[2];
+//  }
+//   function calculator(num1, num2, num3, num4, num5,opp){
+   
+//    if (opp === "plus"&& process.argv.length===parseInt(4) ){
+//      return add2Num(num1, num2);
+//    } else if (opp === "minus") {
+//      return sub(num1, num2);
+//    } else if (opp === "plus"&& process.argv.length<parseInt(8)) {
+//      return addMultNum(num1, num2, num3, num4, num5);
+//    } else if (opp === "minus"&&process.argv.length<parseInt(8)) {
+//      return subMultNum(num1, num2,num3,num4,num5);
+//    } else if(opp === "modulo"|| "divide"){
+//      return div( );
+//      }
+//    }
+ 
+//  console.log(calculator(parseInt(process.argv[3]),parseInt(process.argv[4]),parseInt(process.argv[5]),parseInt(process.argv[6]),parseInt(process.argv[7]),parseInt(process.argv[2])));
+
+
+
+
+
+// //
+// //console.log(process.argv[1]+process.argv[0]+process.argv[2]+process.argv[0]+process.argv[3]+process.argv[0]+process.argv[4])
+
 
 // Don't change anything below this line.
 module.exports = calculator;
+
+
+