01 C | Swap two numbers without using third variable
In this video we will learn to swap two numbers stored in two variables without taking help of a third variable.
In this video we are dealing we are dealing with a general formula which works perfectly well for both positive and negative values.
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Case 1: For two positive values
(Kindly watch the video)
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Case 2: For one positive and one negative value
If x = 10 and y = -20
x = x + y = 10 + (-20) = -10
y = x - y = (-10) - (-20) = 10
x = x - y = (-10) - 10 = -20
Now, x = -20 and y = 10
Value swapped.
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Case 3: For two negative values
If x = -10 and y = -20
x = x + y = (-10) + (-20) = -30
y = x - y = (-30) - (-20) = -10
x = x - y = (-30) - (-10) = -20
Now, x = -20 and y = -10
Value swapped.
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Thanks for reading and thanks for watching :-)
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