let amortizationSteps = “”; const currencySymbol = “₹”, fixedCurrency = “INR”; function calculateAmortization(){ amortizationSteps=””; const principal = parseFloat(document.getElementById(“loanAmount”).value); const term = parseInt(document.getElementById(“loanTerm”).value); const rate = parseFloat(document.getElementById(“interestRate”).value) / 100 / 12; const months = term * 12; if (isNaN(principal) || isNaN(term) || isNaN(rate) || principal <= 0 || term <= 0 || rate <= 0) { alert("Please enter valid positive values for all fields."); return; } const emi = (principal * rate * Math.pow(1 + rate, months)) / (Math.pow(1 + rate, months) – 1); document.getElementById("emiResult").value = formatCurrency(emi * 12); let schedule = ""; for (let i = 1; i <= months; i++) { let interestPayment = principal * rate; let principalPayment = emi – interestPayment; principal -= principalPayment; schedule += `Month ${i}: Principal: ${formatCurrency(principalPayment)} | Interest: ${formatCurrency(interestPayment)} | Remaining Balance: ${formatCurrency(principal)}\n`; } document.getElementById("schedule").value = schedule; amortizationSteps += `Inputs:
Loan Amount: ${formatCurrency(principal)}
Term: ${term} years
Interest Rate: ${(rate*100).toFixed(2)}%

`; amortizationSteps += `Formulas:
EMI = P × r × (1+r)^n / ((1+r)^n – 1)

`; amortizationSteps += `Results:
EMI: ${formatCurrency(emi * 12)}
Amortization Schedule:
${schedule}`; if (document.getElementById(“calculationStepsAmortization”).style.display === “block”) { document.getElementById(“calculationStepsAmortization”).innerHTML = amortizationSteps; } } function resetAmortization(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); document.getElementById(“schedule”).value = “”; amortizationSteps = “”; document.getElementById(“calculationStepsAmortization”).innerHTML = “

Not calculated yet.

“; } function toggleAmortizationSteps(){ const s = document.getElementById(“calculationStepsAmortization”); const a = document.getElementById(“toggleArrowAmortization”); if (s.style.display === “none” || s.style.display === “”) { s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = amortizationSteps || “

Not calculated yet.

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