Auto Loan Calculator 84 Month Loan

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

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

`; loanSteps += `Results:
Monthly Payment: ${formatCurrency(monthlyPayment)}
Total Interest: ${formatCurrency(totalInterest)}
Total Loan Amount: ${formatCurrency(totalAmount)}
`; if (document.getElementById(“calculationStepsLoan”).style.display === “block”) { document.getElementById(“calculationStepsLoan”).innerHTML = loanSteps; } } function resetAutoLoan(){ document.querySelectorAll(“#autoLoanCalculator 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; }