// Multiple arguments
let add = function (a, b, c) {
    return a + b + c
}

let result = add(10, 1, 5)
console.log(result)

// Default arguments
let getScoreText = function (name = 'Anonymous', score = 0) {
    return 'Name: ' + name + ' - Score: ' + score
}

let scoreText = getScoreText(undefined, 99)
console.log(scoreText)

// Challenge area
// total,tipPercent = 0.2

let calculateTip = function (total, tipPercent = 0.2) {
    let tip = total * tipPercent
    return tipPercent * 100 + '% Tip on $' + total + ' is $' + tip
}

let tip = calculateTip(100)
console.log(tip)

let tip2 = calculateTip(100, 0.15)
console.log(tip2)