difference between ref and out keywords

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Anupam Mishra · Answer

If we want to pass a variable as ref parameter we need to initialize it before we pass it as ref parameter to method. Ref keyword will pass parameter as a reference this means when the value ofand parameter is changed in called method it get reflected in calling method also.i = 10;public static void RefTest(ref int val1){   val1 += 10;}Output : 20If we want to pass a variable as out parameter we don’t need to initialize it before we pass it as out parameter to method. Out keyword also will pass parameter as a reference but here outand parameter must be initialized in called method before it return value to calling method.int i,j; // No need to initialize variableOutTest(out i, out j);public static int OutTest(out int val1, out int val2){  val1 = 5;  val2 = 10;  return 0;}

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difference between ref and out keywords

Anupam Mishra

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