csharp 使用条件运算符从字符串到数字的条件解析的示例。

Posted 2021-05-12

int num;
string str = Console.ReadLine();
bool parse = Int32.TryParse(str, out num);

Console.WriteLine(parse ? num + " squared is " + num * num + "." : "Invalid number.");

// 4
// 4 squared is 16.

// test
// Invalid number.