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What will be the output of the following C# code? | Question 6

37. What will be the output of the following C# code?

using System;

namespace MyApplication {
  class Program {
    static void Main(string[] args) {
      int a = 10, b = 20;
      Console.WriteLine("{0}+{1}", a, b);
    }
  }
}

1. 20
2. 30
3. 10+20
4. 10+10

Answer: C) 10+20

Explanation:

In the statement, Console.WriteLine("{0}+{1}", a, b); - {0} is the placeholder for variable a and {1} is the placeholder for variable b, {0}+{1} will not perform any operation, values of a and b will be printed at the place of {0} and {1}. Thus, the output will be 10+20.