control.swift

// Conditional statement
// https://docs.swift.org/swift-book/LanguageGuide/ControlFlow.html
if tomato.name.contains("Swift") {
    print("Good for you!")
}else{
    print("That's fine. You can use Flutter or ReactNative too. It even cross platfrom solution!")
}

// Loop
let languages = ["Python", "Golang", "Swift", "Java"]
for l in languages{
    print(l + " is good!")
}

// https://pypl.github.io/PYPL.html
let popularity_of_languages  = ["Python": 1, "Golang": 13, "Swift": 9, "Java":2]
for (lang, pop) in popularity_of_languages{
    print(lang + " is number " + String(pop))
}

for rank in 1...9{
    if (rank==9){