Write a Program to Swap two numbers.
Now, there are different way of doing it. By using temporary variable. Other swapping technique is done without using temporary variable. lets see them one by one.
Using Temporary Variable
public class SwapTwoNumbers { public static void main(String[] args) { float firstNum = 1.20f, secondNum = 2.45f; System.out.println("First number = " + firstNum); System.out.println("Second number = " + secondNum); // Value of firstNum is assigned to temp float temp = firstNum; // Value of secondNum is assigned to firstNum firstNum = secondNum; // Value of temp (which contains the initial value of firstNum) is assigned to secondNum secondNum = temp; System.out.println("First number = " + firstNum); System.out.println("Second number = " + secondNum); } }
Output
First number = 1.2 Second number = 2.45 First number = 2.45 Second number = 1.2
Without using Temporary variable
class SwapTwoNumbers { public static void main(String a[]) { int x = 1.5; int y = 2.5; System.out.println("Numbers before swapping numbers: "+x +" "+ y); /*Swapping logic*/ x = x + y; y = x - y; x = x - y; System.out.println("Numbers After swapping: "+x +" " + y); } }
Output
Numbers before swapping numbers: 1.5 2.5 Numbers After swapping: 2.5 1.5
