EducaSwift

If we want to avoid nesting our code with multiple if statements, we can use guard instead. guard will check a condition in the same way, but stoping the code when the condition is not met.

var shoppingList: [String] = [
    "Potato",
    "Tomato",
    "Chicken",
    "Salmon"
]

func removeAt(index: Int) {
    guard index < shoppingList.count else {
        return
    }

    shoppingList.remove(at: index)
}	

guard let

if let can be also replaced with this new statement.

func sayMyName(name: String?) {
    guard let unwrappedName = name else {
        return
    }

    print(unwrappedName)
}

You can shorten this using the same name for the unwrapped value:

guard let name else {
	return
}

You can use other keywords instead of return, like throw.

guard let name else {
	throw NSError()	
}

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