Merge pull request #1786 from ak-sh-at/loan

Loan Calculator Modified

Author: TusharKesarwani

Projects/Loan-calculator/loancalculator.js

@@ -2,11 +2,46 @@ function computeLoan(){
     const amount = document.querySelector('#amount').value;
     const interest_rate = document.querySelector('#interest_rate').value;
     const months = document.querySelector('#months').value;
+    if(amount<0&&interest_rate<0&&months<0)
+    {
+        alert("Please enter positive Loan amount , positive Interest Rate and positive number of months!");
+        return;  
+    }
+    if(amount<0 && interest_rate<0)
+    {
+        alert("Please enter positive Loan amount and positive Interest rate!");
+        return;
+    }
+    if(amount<0 && months<0)
+    {
+        alert("Please enter positive Loan amount and positive number of months!");
+        return;
+    }
+    if(interest_rate<0&&months<0)
+    {
+        alert("Please enter positive Interest Rate and positive number of months!");
+        return;
+    }
+    if(amount<0)
+    {
+        alert("Please enter positive Loan amount!");
+        return;
+    }
+    if(interest_rate<0)
+    {
+        alert("Please enter positive Interest Rate!");
+        return;
+    }
+    if(months<0)
+    {
+        alert("Please enter positive number of months!");
+        return;
+    }
     const interest = (amount * (interest_rate * 0.01)) / months;
     let payment = ((amount / months) + interest).toFixed(2); //calculate monthly payment
 
     //regedit to add a comma after every three digits
     payment = payment.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ","); //\B looks for a word boundary, ? says what to look for, \d looks for 3 digits in a row
     document.querySelector('#payment').innerHTML = `Monthly Payment = ${payment}` 
-    document.getElementById("payment").style.color = "white";
+    document.getElementById("payment").style.color = "black";
 }