💡 Java Interview / Coding Question: 👉 How do you swap two variables without using a temp variable? Here are the two most common Java approaches 👇 ✅ 1. Using Addition & Subtraction a = a b; b = a - b; a = a - b; ✅ 2. Using XOR (Most Efficient) a = a ^ b; b = a ^ b; a = a ^ b; 🎯 Explanation: - In Addition/Subtraction, values are mathematically rearranged - In XOR, bits are swapped without extra memory - Both avoid using a temporary variable - Popular interview question to test logic fundamenta
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