let calculationSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateLoan(){ calculationSteps=””; const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100; const loanTerm = parseFloat(document.getElementById(“loanTerm”).value); const extraRepayment = parseFloat(document.getElementById(“extraRepayment”).value); if (isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTerm) || isNaN(extraRepayment) || loanAmount <= 0 || interestRate <= 0 || loanTerm <= 0) { alert("Please enter valid positive values for all fields."); return; } const monthlyRate = interestRate / 12; const numberOfPayments = loanTerm * 12; const monthlyPayment = (loanAmount * monthlyRate) / (1 – Math.pow(1 + monthlyRate, -numberOfPayments)); const totalPayments = monthlyPayment * numberOfPayments; const remainingBalance = loanAmount – (extraRepayment * numberOfPayments); const totalInterest = totalPayments – loanAmount; document.getElementById("resultLoanBalance").value = formatCurrency(remainingBalance); document.getElementById("totalInterest").value = formatCurrency(totalInterest); calculationSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Interest Rate: ${(interestRate * 100).toFixed(1)}%
Loan Term: ${loanTerm} years
Extra Repayment: ${formatCurrency(extraRepayment)}

`; calculationSteps += `Results:
Remaining Loan Balance: ${formatCurrency(remainingBalance)}
Total Interest Paid: ${formatCurrency(totalInterest)}
`; if (document.getElementById(“calculationSteps”).style.display === “block”) { document.getElementById(“calculationSteps”).innerHTML = calculationSteps; } } function resetLoan() { document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); calculationSteps = “”; document.getElementById(“calculationSteps”).innerHTML = “

Not calculated yet.

“; } function toggleCalculationSteps() { const steps = document.getElementById(“calculationSteps”); const arrow = document.getElementById(“toggleArrow”); if (steps.style.display === “none” || steps.style.display === “”) { steps.style.display = “block”; arrow.style.transform = “rotate(180deg)”; steps.innerHTML = calculationSteps || “

Not calculated yet.

“; } else { steps.style.display = “none”; arrow.style.transform = “rotate(0deg)”; } } function formatCurrency(n) { return currencySymbol + n.toFixed(2) + ” ” + fixedCurrency; }