let loanSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateLoan(){ loanSteps=””; const homePrice=parseFloat(document.getElementById(“homePrice”).value); const downPayment=parseFloat(document.getElementById(“downPayment”).value); const interestRate=parseFloat(document.getElementById(“interestRate”).value)/100; const loanTerm=parseInt(document.getElementById(“loanTerm”).value); if(isNaN(homePrice)||isNaN(downPayment)||isNaN(interestRate)||isNaN(loanTerm)||homePrice<=0||downPayment<=0){ alert("Please enter valid positive values for all fields."); return; } const loanAmount = homePrice – downPayment; const monthlyInterestRate = interestRate / 12; const totalPayments = loanTerm * 12; const monthlyPayment = loanAmount * monthlyInterestRate / (1 – Math.pow(1 + monthlyInterestRate, -totalPayments)); const totalInterest = (monthlyPayment * totalPayments) – loanAmount; document.getElementById("monthlyPayment").value = formatCurrency(monthlyPayment); document.getElementById("totalInterest").value = formatCurrency(totalInterest); loanSteps += `Inputs:
Home Price: ${formatCurrency(homePrice)}
Down Payment: ${formatCurrency(downPayment)}
Interest Rate: ${(interestRate*100).toFixed(2)}%
Loan Term: ${loanTerm} years

`; loanSteps += `Formulas:
Monthly Payment = Loan Amount × Monthly Interest Rate / (1 – (1 + Monthly Interest Rate) ^ -Total Payments)
Total Interest = (Monthly Payment × Total Payments) – Loan Amount

`; loanSteps += `Results:
Estimated Monthly Payment: ${formatCurrency(monthlyPayment)}
Total Interest Paid: ${formatCurrency(totalInterest)}
`; loanSteps += `Tip: A lower interest rate and longer loan term will lower your monthly payment, but result in more total interest paid over time.`; if(document.getElementById(“calculationStepsLoan”).style.display===”block”){ document.getElementById(“calculationStepsLoan”).innerHTML = loanSteps; } } function resetLoan(){ document.querySelectorAll(“#calculator input”).forEach(el=>el.value=””); loanSteps=””; document.getElementById(“calculationStepsLoan”).innerHTML=”

Not calculated yet.

“; } function toggleLoanSteps(){ const s=document.getElementById(“calculationStepsLoan”); const a=document.getElementById(“toggleArrowLoan”); if(s.style.display===”none”||s.style.display===””){ s.style.display=”block”;a.style.transform=”rotate(180deg)”; s.innerHTML=loanSteps||”

Not calculated yet.

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