TYPESCRIPT

rest parameters in typescript

A rest parameter allows you a function to accept zero or more arguments
of the specified type. In TypeScript, rest parameters follow these rules:

1. A function has only one rest parameter.
2. The rest parameter appears last in the parameter list.
3. The type of the rest parameter is an array type.

// Example: 
function getTotal(...numbers: number[]): number {
    let total = 0;
    numbers.forEach((num) => total += num);
    return total;
}

console.log(getTotal()); // 0
console.log(getTotal(10, 20)); // 30
console.log(getTotal(10, 20, 30)); // 60