Problem Statement

Write a Java program to swap the values of two variables. For instance, if variable a holds the value 5 and variable b holds the value 10, after swapping, a should hold 10 and b should hold 5.

Examples

Example 1:

• Input: a = 5, b = 10
• Output: a = 10, b = 5
• Justification: Values of variable a and b are swapped.

Example 2:

• Input: a = 3.14, b = 2.71
• Output: a = 2.71, b = 3.14
• Justification: Values of variable a and b are swapped.

Step-by-Step Algorithm

Swapping two variables using a temporary variable involves the following steps:

1. Initialize Variables:
   • Let a and b be the two variables to be swapped.
2. Use a Temporary Variable:
   • Create a temporary variable temp to hold the value of a.
3. Swap Values:
   • Assign the value of b to a.
   • Assign the value stored in temp to b.
4. Result:
   • The values of a and b are now swapped.

Code

Below is the Java code that demonstrates how to swap two variables using a temporary variable.

Explanation:

1. Example 1: Swapping Integers

   • Before Swap:
     • a is initialized to 5.
     • b is initialized to 10.
   • Swapping Process:
     • A temporary variable temp stores the value of a (temp = 5).
     • a is assigned the value of b (a = 10).
     • b is assigned the value stored in temp (b = 5).
   • After Swap:
     • a holds 10.
     • b holds 5.

2. Example 2: Swapping Doubles

   • Before Swap:
     • x is initialized to 3.14.
     • y is initialized to 2.71.
   • Swapping Process:
     • A temporary variable tempDouble stores the value of x (tempDouble = 3.14).
     • x is assigned the value of y (x = 2.71).
     • y is assigned the value stored in tempDouble (y = 3.14).
   • After Swap:
     • x holds 2.71.
     • y holds 3.14.