How do you swap two numbers without using a third variable in Java?
Question
How do you swap two numbers without using a third variable in Java?
Solution
Sure, here is how you can swap two numbers without using a third variable in Java:
public class Main {
public static void main(String[] args) {
int a = 10;
int b = 20;
System.out.println("Before swapping: a = " + a + ", b = " + b);
// Swapping without third variable
a = a + b; // now a is sum of a and b
b = a - b; // subtract b from sum (which is actually a) and assign it to b
a = a - b; // subtract b (which is actually a) from sum and assign it to a
System.out.println("After swapping: a = " + a + ", b = " + b);
}
}
In this code:
- We first declare two integer variables
aandband assign them the values 10 and 20 respectively. - We then print the values of
aandbbefore swapping. - To swap the values, we first add
aandband assign the result toa. - Then we subtract the new value of
bfromaand assign the result tob. At this point,b
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