let mortgageSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateMortgage() { mortgageSteps = “”; const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const loanTerm = parseFloat(document.getElementById(“loanTerm”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100; if (isNaN(loanAmount) || isNaN(loanTerm) || isNaN(interestRate) || loanAmount <= 0 || loanTerm <= 0) { alert("Please enter valid positive values for all fields."); return; } const monthlyInterestRate = interestRate / 12; const numberOfPayments = loanTerm * 12; const monthlyPayment = (loanAmount * monthlyInterestRate) / (1 – Math.pow(1 + monthlyInterestRate, -numberOfPayments)); document.getElementById("monthlyPayment").value = formatCurrency(monthlyPayment); mortgageSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Loan Term: ${loanTerm} Years
Interest Rate: ${(interestRate * 100).toFixed(2)}%

`; mortgageSteps += `Formula:
Monthly Payment = Loan Amount × Monthly Interest Rate / (1 – (1 + Monthly Interest Rate)^(-Number of Payments))

`; mortgageSteps += `Result:
Estimated Monthly Payment: ${formatCurrency(monthlyPayment)}
`; if (document.getElementById(“calculationStepsMortgage”).style.display === “block”) { document.getElementById(“calculationStepsMortgage”).innerHTML = mortgageSteps; } } function resetMortgage() { document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); mortgageSteps = “”; document.getElementById(“calculationStepsMortgage”).innerHTML = “

Not calculated yet.

“; } function toggleMortgageSteps() { const s = document.getElementById(“calculationStepsMortgage”); const a = document.getElementById(“toggleArrowMortgage”); if (s.style.display === “none” || s.style.display === “”) { s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = mortgageSteps || “

Not calculated yet.

“; } else { s.style.display = “none”;