let balloonSteps = “”; const currencySymbol = “$”, fixedCurrency = “USD”; function calculateBalloonPayment(){ balloonSteps=””; const loanAmount=parseFloat(document.getElementById(“loanAmount”).value); const annualRate=parseFloat(document.getElementById(“annualRate”).value)/100; const loanTerm=parseInt(document.getElementById(“loanTerm”).value); const balloonTerm=parseInt(document.getElementById(“balloonTerm”).value); const monthlyPayment=parseFloat(document.getElementById(“monthlyPayment”).value); if(isNaN(loanAmount)||isNaN(annualRate)||isNaN(loanTerm)||isNaN(balloonTerm)||isNaN(monthlyPayment)||loanAmount<=0||annualRate<=0||loanTerm<=0||balloonTerm<=0||monthlyPayment<=0){ alert("Please enter valid positive values for all fields."); return; } const balloonPaymentAmount = loanAmount * Math.pow(1 + annualRate / 12, balloonTerm * 12) – monthlyPayment * ((Math.pow(1 + annualRate / 12, balloonTerm * 12) – 1) / (annualRate / 12)); document.getElementById("balloonPayment").value = formatCurrency(balloonPaymentAmount); balloonSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Annual Interest Rate: ${(annualRate * 100).toFixed(1)}%
Loan Term: ${loanTerm} years
Balloon Term: ${balloonTerm} years
Monthly Payment: ${formatCurrency(monthlyPayment)}

`; balloonSteps += `Formula:
Balloon Payment = Loan Amount × (1 + Interest Rate/12)^(Balloon Term × 12) – Monthly Payment × ((1 + Interest Rate/12)^(Balloon Term × 12) – 1) / (Interest Rate/12)

`; balloonSteps += `Results:
Balloon Payment: ${formatCurrency(balloonPaymentAmount)}
`; balloonSteps += `Tip: Ensure you have the funds to cover the balloon payment at the end of your loan term.`; if(document.getElementById(“calculationStepsBalloon”).style.display===”block”){ document.getElementById(“calculationStepsBalloon”).innerHTML = balloonSteps; } } function resetBalloonPayment(){ document.querySelectorAll(“#calculator input”).forEach(el=>el.value=””); balloonSteps=””; document.getElementById(“calculationStepsBalloon”).innerHTML=”

Not calculated yet.

“; } function toggleBalloonPaymentSteps(){ const s=document.getElementById(“calculationStepsBalloon”); const a=document.getElementById(“toggleArrowBalloon”); if(s.style.display===”none”||s.style.display===””){ s.style.display=”block”;a.style.transform=”rotate(180deg)”; s.innerHTML=balloonSteps||”

Not calculated yet.

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