Build calculator operations as functions:
const add = (a, b) => a + b
const subtract = (a, b) => a - b
const multiply = (a, b) => a * b
const divide = (a, b) => b !== 0 ? a / b : "Error"
function calculate(a, b, operation) {
return operation(a, b)
}
console.log(calculate(10, 5, add)) // 15
console.log(calculate(10, 5, subtract)) // 5
console.log(calculate(10, 5, multiply)) // 50
console.log(calculate(10, 5, divide)) // 2