A Level Scientific Calculator Online

let calculationSteps = “”; function calculate() { calculationSteps = “”; const value1 = parseFloat(document.getElementById(“inputValue1”).value); const value2 = parseFloat(document.getElementById(“inputValue2”).value); const operation = document.getElementById(“operation”).value; let result; if (isNaN(value1) || isNaN(value2)) { alert(“Please enter valid numbers.”); return; } switch (operation) { case ‘add’: result = value1 + value2; break; case ‘subtract’: result = value1 – value2; break; case ‘multiply’: result = value1 * value2; break; case ‘divide’: if (value2 === 0) { alert(“Cannot divide by zero.”); return; } result = value1 / value2; break; case ‘power’: result = Math.pow(value1, value2); break; } document.getElementById(“result”).value = result; calculationSteps += `Inputs:
Value 1: ${value1}
Value 2: ${value2}

`; calculationSteps += `Operation:
${operation.charAt(0).toUpperCase() + operation.slice(1)}

`; calculationSteps += `Result:
${result}
`; if (document.getElementById(“calculationSteps”).style.display === “block”) { document.getElementById(“calculationSteps”).innerHTML = calculationSteps; } } function resetCalculator() { document.querySelectorAll(“#aLevelScientificCalculator input”).forEach(el => el.value = “”); document.getElementById(“operation”).selectedIndex = 0; calculationSteps = “”; document.getElementById(“calculationSteps”).innerHTML = “

Not calculated yet.

“; } function toggleCalculationSteps() { 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 = calculationSteps || “

Not calculated yet.

“; } else { s.style.display = “none”; a.style.transform = “rotate(0deg)”; } }