function add(num1, num2) {
return num1 + num2;
}
function subtract(num1, num2) {
return num1 - num2;
}
function multiply(num1, num2) {
return num1 * num2;
}
function divide(num1, num2) {
if(num2 === 0) return undefined;
return num1 / num2;
}
let num1 = 16;
let num2 = 4;
let operation = "/";
let result;
if (operation === "+") {
result = add(num1, num2);
} else if (operation === "-") {
result = subtract(num1, num2);
} else if (operation === "*") {
result = multiply(num1, num2);
} else if (operation === "/") {
result = divide(num1, num2);
} else {
result = "Invalid operation";
}
console.log("The Result of this operation is : " + result);