Swap two numbers without using a temporary variable

Question

Ganesh · Accepted Answer

x = 10
y = 5

x = x+y    // x = 15, y =5
y = x-y    // x = 15 , y = 10
x = x-y    // x = 15 - 10 = 5 , y = 10

another way,

x = x^y
y = x^y
x = x^y

Rishi · Answer

Shift register.

Anonym · Answer

a = a ^ b;
b = a ^ b;
a = a ^ b;

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