Java Loan Calculator

Question

Hello guys,

I posted this question earlier, but it's not showing up, even in my questions sections, so maybe somehow it didn't get posted, so I will write it again"

I want to complete the Loan calculator code project, but I am running into an error that I don't know how to solve.

I don't know how to solve it because I thought what I wrote is an operation that Java can execute under these circumstances, but it seems like it cannot which is why I am stuck on this problem.

The error is:
/usercode/Program.java:18: error: not a statement
amount - .9*amount;
^
1 error

Next I will write what the problem says and how I tried to solve it so you can see what I did.

Problem:
You take a loan from a friend and need to calculate how much you will owe him after 3 months.
You are going to pay him back 10% of the remaining loan amount each month.
Create a program that takes the loan amount as input, calculates and outputs the remaining amount after 3 months.

Sample Input:
20000

Sample Output:
10628

Here is the monthly payment schedule:
Month 1
Payment: 10% of 20000 = 2000
Remaining amount: 18000
Month 2
Payment: 10% of 18000 = 1800
Remaining amount: 16200
Month 3:
Payment: 10% of 16200 = 1620
Remaining amount: 14580
Use a loop to calculate the payment and remaining amounts for each month.
Also, use integers for amounts.

My code:
import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int amount = scanner.nextInt();
//your code goes here

while (x >= amount*.729) {
System.out.println(amount);
if (amount == .9*amount) {
continue;
}
if (amount == .81*amount) {
continue;
}
amount - .9*amount;
}
}

Answer 1

Have a search in the forum (wouldn't have been possible the last few days, I don't think).
I believe there's a problem with your loop and part of the logic.

https://www.sololearn.com/discuss/2995588/?ref=app

Answer 2

AJ means use the formula

amount = amount - amount * 10 / 100;

inside a while loop. Maybe like this:

int loopcounter = 3;
while(loopcounter != 0)
{
amount = amount - amount * 10 / 100;
loopcounter--;
}

Answer 3

Iulia

You are not assigning (amount - 0.9 * amount) to a variable

And also 0.9 not .9

Also why amount * .729
Ans where is .9 or .81 in task?

formula is

amount = amount - amount * 10 / 100;

simple

just use this inside loop

Answer 4

Iulia

Check your question, you have mentioned "error: not a statement"

If you don't assign a statement to a variable or you don't print statement, you will get this error so there should be

amount = amount - 0.9 * amount;

Answer 5

No .9
Yes 0.9

Answer 6

Hello A͢J, what do you mean when you say that I am not assigning (amount - 0.9*amount) to a variable?

I meant

1) to put System.out.println(amount - 0.9*amount) in the last line instead of writing it without the print statement, which I have done now, and

2) I also meant to put "amount" instead of x at the start of the while loop, which I fixed, but now the problem is that the "Execution timed out", but I don't know why it timed out.

Also, the reason I didn't print the amount*0.9 and amount*0.81 because the problem asked to print how much the man would owe after 3 months.

So the new loop says:

while (amount >= amount*0.729) {
System.out.println(amount);
if (amount == 0.9*amount) {
continue;
}
if (amount == 0.81*amount) {
continue;
}
System.out.println(amount - 0.9*amount);
}

Also, what do you mean by just use this inside loop?

Thanks,

Iulia

Answer 7

amount - 0.9*amount ; is no effect statement. You need to store result to make it valid and use later.
amount = (int)(amount - 0.9*amount); //cast to int
And your continue statements may cause infinite loop. And i guess, you if condition never comes true because of any floating value.
Amount is integer value and 0.9*amount will have precision value so won't equal until precision value is zero.
Don't print result in loop. Task asked to print only final result.

You need find 10% of amount, subtract it from amount.
Repeat this only 3 times in loop.
Finally after loop print result amount.

Answer 8

Hold on guys,

I need to get back to this problem.