How will you swap two variables? Write different approaches for the sa

1.	How will you swap two variables? Write different approaches for the same.
Answer» USING Extra MEMORY SPACE: int NUM1=20, NUM2=30, temp;temp = num1;num1 = num2;num2 = temp; Using Arithmetic Operators: int num1=20, num2=30;num1=num1 + num2;num2=num1 - num2;num1=num1 - num2; Using Bit-Wise Operators: int num1=20, num2=30;num1=num1 ^ num2;num2=num2 ^ num1;num1=num1 ^ num2; Using One-liner Bit-wise Operators: int num1=20, num2=30;num1^=num2^=num1^=num2; The order of evaluation here is right to left. Using One-liner Arithmetic Operators: int num1=20, num2=30;num1 = (num1+num2)-(num2=num1); Here the order of evaluation is from left to right.

How will you swap two variables? Write different approaches for the same.

Answer»

int NUM1=20, NUM2=30, temp;temp = num1;num1 = num2;num2 = temp;

int num1=20, num2=30;num1=num1 + num2;num2=num1 - num2;num1=num1 - num2;

int num1=20, num2=30;num1=num1 ^ num2;num2=num2 ^ num1;num1=num1 ^ num2;

int num1=20, num2=30;num1^=num2^=num1^=num2;

The order of evaluation here is right to left.

int num1=20, num2=30;num1 = (num1+num2)-(num2=num1);

Here the order of evaluation is from left to right.