// Example JavaScript code function factorial(n) { if (n === 0 || n === 1) { return 1; } else { return n * factorial(n - 1); } }  // Fibonacci sequence generator function fibonacci(n) { if (n <= 1) { return n; } else { return fibonacci(n - 1) + fibonacci(n - 2); } }  // Array sum function function sumArray(arr) { return arr.reduce((sum, num) => sum + num, 0); }  // Class example class Calculator { constructor() { this.history = []; }  add(a, b) { const result = a + b; this.history.push(\`Added \${a} and \${b} to get \${result}\`); return result; }  subtract(a, b) { const result = a - b; this.history.push(\`Subtracted \${b} from \${a} to get \${result}\`); return result; }  getHistory() { return this.history; } }

function factorial(n){return n===0||n===1?1:n*factorial(n-1)}function fibonacci(n){return n<=1?n:fibonacci(n-1)+fibonacci(n-2)}function sumArray(arr){return arr.reduce((sum,num)=>sum+num,0)}class Calculator{constructor(){this.history=[]}add(a,b){const result=a+b;this.history.push(\`Added \${a} and \${b} to get \${result}\`);return result}subtract(a,b){const result=a-b;this.history.push(\`Subtracted \${b} from \${a} to get \${result}\`);return result}getHistory(){return this.history}}