I have to swap two variables with a number value without using a third variable. What is the simple solution?
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I have to swap two variables with a number value without using a third variable. What is the simple solution?
Let us see one of the method namely by using arithmetic operators.
Consider 2 variables say x=50 and y=70 and let us see how to swap the value of two variables that is make x=70 and y=50 without using third variable. This can be done by using following arithmetic operations namely
x= x + y
y= x – y
x= x – y
Which gives
• x= x + y gives x= 70 + 50 an so x is equal to 120
• y= x – y gives y = 120 – 70 which makes the value of y as 50
• x= x – y gives x= 120 – 50 and thus value of x becomes 70