let loanSteps = “”; const currencySymbol = “₹”, fixedCurrency = “INR”; function calculateLoan() { loanSteps=””; const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100; const loanTenure = parseInt(document.getElementById(“loanTenure”).value) * 12; const partPayment = parseFloat(document.getElementById(“partPayment”).value); if (isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTenure) || isNaN(partPayment) || loanAmount <= 0 || interestRate <= 0 || loanTenure <= 0) { alert("Please enter valid positive values for all fields."); return; } const principalRemaining = loanAmount – partPayment; const rateOfInterest = interestRate / 12; const emi = (principalRemaining * rateOfInterest * Math.pow(1 + rateOfInterest, loanTenure)) / (Math.pow(1 + rateOfInterest, loanTenure) – 1); document.getElementById("newLoanAmount").value = formatCurrency(principalRemaining); document.getElementById("newEMI").value = formatCurrency(emi.toFixed(2)); loanSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Interest Rate: ${(interestRate*100).toFixed(1)}%
Tenure: ${loanTenure / 12} Years
Part Payment: ${formatCurrency(partPayment)}

`; loanSteps += `Formulas:
EMI = (Loan Amount × Monthly Rate of Interest × (1 + Monthly Rate of Interest)^Tenure) ÷ ((1 + Monthly Rate of Interest)^Tenure – 1)

`; loanSteps += `Results:
New Loan Amount: ${formatCurrency(principalRemaining)}
New EMI: ${formatCurrency(emi.toFixed(2))}
`; loanSteps += `Tip: Making a part payment can reduce your EMI and the total interest paid over the loan tenure.`; if (document.getElementById(“calculationSteps”).style.display === “block”) { document.getElementById(“calculationSteps”).innerHTML = loanSteps; } } function resetLoan() { document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); loanSteps = “”; document.getElementById(“calculationSteps”).innerHTML = “

Not calculated yet.

“; } function toggleSteps() { const s = document.getElementById(“calculationSteps”); const a = document.getElementById(“toggleArrow”); 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; }