Swap two numbers without using third variable

Question

Tasaddaq Aziz · Accepted Answer

int  a=5, b=10;            
       Console.WriteLine("Before swap a= "+a+" b= "+b);    
       a=a+b; //a=15 (5+10)      
       b=a-b; //b=5 (15-10)      
       a=a-b; //a=10 (15-5)   
       Console.Write("After swap a= "+a+" b= "+b);

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