Question

Write a program that takes a single integer input from the user and stores it in a variable. Your program should increase the value of this variable by one four times, printing "number is now " followed by its value each time, then decrease it by one four times, again printing "number is now " and the value each time. You must use unary operators to increase/decrease the value of the variable to receive full credit for this assignment.
in java

Answer 1

Certainly! Below is a Java program that fulfills your requirements. It takes a single integer input from the user, increments the value by one four times, and then decrements it by one four times, printing the value after each operation.

```java
import java.util.Scanner;

public class IncrementDecrement {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

// Prompt user for input
System.out.print("Enter an integer: ");
int number = scanner.nextInt();

// Increment the number by one four times
for (int i = 0; i < 4; i++) {
number++; // Increment using unary operator
System.out.println("number is now " + number);
}

// Decrement the number by one four times
for (int i = 0; i < 4; i++) {
number--; // Decrement using unary operator
System.out.println("number is now " + number);
}

// Close the scanner
scanner.close();
}
}
```

### How the Program Works
1. The program starts by importing the `Scanner` class to handle user input.
2. It prompts the user to enter an integer and stores it in the variable `number`.
3. The first `for` loop runs four times, using the `++` operator to increment `number` and print its value after each increment.
4. The second `for` loop runs four times, using the `--` operator to decrement `number` and print its value after each decrement.
5. Finally, the scanner is closed to avoid resource leaks.

### Usage
To use the program, simply compile and run it, then input an integer when prompted. The program will show you the incremented and decremented values in sequence.