let tvmSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateTVM(){ tvmSteps=””; const principal = parseFloat(document.getElementById(“principalAmount”).value); const rate = parseFloat(document.getElementById(“rate”).value) / 100; const time = parseFloat(document.getElementById(“time”).value); const frequency = parseInt(document.getElementById(“compoundingFrequency”).value); if (isNaN(principal) || isNaN(rate) || isNaN(time) || frequency <= 0 || principal <= 0 || time <= 0) { alert("Please enter valid positive values for all fields."); return; } const futureValue = principal * Math.pow(1 + rate / frequency, frequency * time); document.getElementById("result").value = formatCurrency(futureValue); tvmSteps += `Inputs:
Principal: ${formatCurrency(principal)}
Annual Interest Rate: ${(rate * 100).toFixed(1)}%
Time: ${time} Years
Compounding Frequency: ${frequency === 1 ? “Annually” : frequency === 2 ? “Semi-Annually” : frequency === 4 ? “Quarterly” : “Monthly”}

`; tvmSteps += `Formulas:
Future Value = Principal × (1 + Rate / Frequency) ^ (Frequency × Time)

`; tvmSteps += `Result:
Future Value: ${formatCurrency(futureValue)}
`; if(document.getElementById(“calculationStepsTVM”).style.display === “block”) { document.getElementById(“calculationStepsTVM”).innerHTML = tvmSteps; } } function resetTVM(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); document.getElementById(“compoundingFrequency”).value = “1”; tvmSteps = “”; document.getElementById(“calculationStepsTVM”).innerHTML = “

Not calculated yet.

“; } function toggleTVMSteps(){ const s = document.getElementById(“calculationStepsTVM”); const a = document.getElementById(“toggleArrowTVM”); if (s.style.display === “none” || s.style.display === “”) { s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = tvmSteps || “

Not calculated yet.

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