Pre Algebra Calculator Online Use

var firstNum = parseFloat(document.getElementById(‘firstNum’).value) || 0;\nvar secondNum = parseFloat(document.getElementById(‘secondNum’).value) || 0;\nvar operation = document.getElementById(‘operation’).value;\nvar result = 0;\nvar explanation = ”;\n\nif (isNaN(firstNum) || isNaN(secondNum)) {\n document.getElementById(‘error’).style.display = ‘block’;\n return;\n}\n\ndocument.getElementById(‘error’).style.display = ‘none’;\n\nif (operation === ‘add’) {\n result = firstNum + secondNum;\n explanation = ‘We add the two numbers: ‘ + firstNum + ‘ + ‘ + secondNum + ‘ = ‘ + result;\n} else if (operation === ‘subtract’) {\n result = firstNum – secondNum;\n explanation = ‘We subtract the second number from the first: ‘ + firstNum + ‘ – ‘ + secondNum + ‘ = ‘ + result;\n} else if (operation === ‘multiply’) {\n result = firstNum * secondNum;\n explanation = ‘We multiply the two numbers: ‘ + firstNum + ‘ × ‘ + secondNum + ‘ = ‘ + result;\n} else if (operation === ‘divide’) {\n if (secondNum === 0) {\n document.getElementById(‘error’).style.display = ‘block’;\n document.getElementById(‘errorMessage’).textContent = ‘Cannot divide by zero.’;\n return;\n }\n result = firstNum / secondNum;\n explanation = ‘We divide the first number by the second: ‘ + firstNum + ‘ ÷ ‘ + secondNum + ‘ = ‘ + result;\n}\n\ndocument.getElementById(‘mainResult’).textContent = result;\ndocument.getElementById(‘explanation’).textContent = explanation;\ndocument.getElementById(‘resultsSection’).style.display = ‘block’;\n\n// Update Chart\nif (window.myChart) {\n window.myChart.data.datasets[0].data = [firstNum, secondNum, Math.abs(result)];\n window.myChart.data.labels = [‘First Number’, ‘Second Number’, ‘Result’];\n window.myChart.update();\n}\n\n// Update Table\nvar tableBody = document.getElementById(‘tableBody’);\ntableBody.innerHTML = ”;\nvar operations = [\n { op: ‘Add’, result: firstNum + secondNum },\n { op: ‘Subtract’, result: firstNum – secondNum },\n { op: ‘Multiply’, result: firstNum * secondNum },\n { op: ‘Divide’, result: secondNum !== 0 ? firstNum / secondNum : ‘Undefined’ }\n];\n\nfor (var i = 0; i < operations.length; i++) {\n var row = document.createElement('tr');\n row.innerHTML = ' ‘ + operations[i].op + ‘

‘ +\n ‘

‘;\n tableBody.appendChild(row);\n}\n\ndocument.getElementById(‘tableSection’).style.display = ‘block’;\n\nvar copyText = ‘Pre-Algebra Calculator Results\\n’;\ncopyText += ‘Operation: ‘ + operation.toUpperCase() + ‘\\n’;\ncopyText += ‘First Number: ‘ + firstNum + ‘\\n’;\ncopyText += ‘Second Number: ‘ + secondNum + ‘\\n’;\ncopyText += ‘Result: ‘ + result + ‘\\n’;\ncopyText += ‘Explanation: ‘ + explanation + ‘\\n\\n’;\ncopyText += ‘Intermediate Calculations:\\n’;\nfor (var j = 0; j < operations.length; j++) {\n copyText += operations[j].op + ': ' + operations[j].result + '\\n';\n}\n\nnavigator.clipboard.writeText(copyText).then(function() {\n var btn = document.getElementById('copyBtn');\n btn.textContent = 'Copied!';\n setTimeout(function() {\n btn.textContent = 'Copy Results';\n }, 2000);\n});\n\nvar copyLinkBtn = document.getElementById('copyLinkBtn');\ncopyLinkBtn.textContent = 'Link Copied!';\nsetTimeout(function() {\n copyLinkBtn.textContent = 'Copy Page Link';\n}, 2000);