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Why is the {0} and {1} needed to show output?
namespace SoloLearn { class Program { static void Main(string[] args) { int x = 10; double y = 20; Console.WriteLine("x = {0}; y = {1}", x, y); } } } // is the {0} and the {1} needed or what is it for in the Console.WriteLine("x = {0}; y = {1}", x, y); line of code?
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