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

`; repaymentSteps += `Formulas:
Monthly Repayment = Loan Amount × Monthly Interest Rate / (1 – (1 + Monthly Interest Rate)^(-Number of Payments))
Total Repayment = Monthly Repayment × Number of Payments
Total Interest = Total Repayment – Loan Amount

`; repaymentSteps += `Results:
Monthly Repayment: ${formatCurrency(monthlyRepayment)}
Total Interest: ${formatCurrency(totalInterest)}
Total Repayment: ${formatCurrency(totalRepayment)}
`; repaymentSteps += `Tip: A longer loan term will reduce your monthly repayment but increase the total interest paid over time.`; if(document.getElementById(“calculationStepsRepayment”).style.display===”block”){ document.getElementById(“calculationStepsRepayment”).innerHTML = repaymentSteps; } } function resetRepayment(){ document.querySelectorAll(“#calculator input”).forEach(el=>el.value=””); repaymentSteps=””; document.getElementById(“calculationStepsRepayment”).innerHTML=”

Not calculated yet.

“; } function toggleRepaymentSteps(){ const s=document.getElementById(“calculationStepsRepayment”); const a=document.getElementById(“toggleArrowRepayment”); if(s.style.display===”none”||s.style.display===””){ s.style.display=”block”;a.style.transform=”rotate(180deg)”; s.innerHTML=repaymentSteps||”

Not calculated yet.

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