var numbers = [45, 73, 195, 53]
//Write your code here
//Replace this comment with your code.
var computedNumbers : [Double] = Array()
for i in 0...numbers.count-1 {computedNumbers[i] = Double(numbers[i])*Double(numbers[i])}
print(computedNumbers)
当我尝试在快速代码上运行代码时，它给了我以下错误：致命错误：索引超出范围。我试图通过将数字数组中的每个元素本身相乘来重现double数组。
您的calculatedNumbers数组为空，并且您尝试访问for循环中为空的computedNumbers [i]值。如果要在其中添加数据，请尝试以下方法：
var numbers = [45, 73, 195, 53]
//Write your code here
//Replace this comment with your code.
var computedNumbers : [Double] = []
for i in 0...numbers.count-1 {
let num = Double(numbers[i])*Double(numbers[i])
computedNumbers.append(num)
}
print(computedNumbers)
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