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Grade Calculator - Convert Grade to letter

Code
Diff
  • func gradeCalc(_ score: Int) -> String {
    do {
        return try letterGrade(for: score)
    } catch {
        return "Not a grade"
    }
}

func letterGrade(for score: Int) throws -> String {
    switch score {
    case 90...100:
        return "A"
    case 80..<90:
        return "B"
    case 70..<80:
        return "C"
    case 60..<70:
        return "D"
    case 0..<60:
        return "F"
    default:
        throw ParameterError.outsideOfValidRange
    }
}

enum ParameterError: Error {
    case outsideOfValidRange
}
    • func gradeCalc(_ score: Int) -> String {
    • if (score < 0 || score > 100)
    • {
    • return "Not a grade";
    • }
    • return ["F","F","F","F","F","F","D","C","B","A","A"][score / 10];
    • }
    • do {
    • return try letterGrade(for: score)
    • } catch {
    • return "Not a grade"
    • }
    • }
    • func letterGrade(for score: Int) throws -> String {
    • switch score {
    • case 90...100:
    • return "A"
    • case 80..<90:
    • return "B"
    • case 70..<80:
    • return "C"
    • case 60..<70:
    • return "D"
    • case 0..<60:
    • return "F"
    • default:
    • throw ParameterError.outsideOfValidRange
    • }
    • }
    • enum ParameterError: Error {
    • case outsideOfValidRange
    • }