This Java project approximates the value of π (Pi) using the Leibniz series. The program takes user input to determine the number of terms (operands) for the approximation and calculates the result using a simple loop.

• Uses the Leibniz formula to approximate π:
  [\pi \approx 4 \times \sum_{n=0}^{\infty} \frac{(-1)^n}{2n+1}]
• User-friendly input via JOptionPane for entering the number of terms.
• Error handling to ensure valid numeric input.
• Prevents program execution with excessively large input values, maintaining performance.
• Displays the approximation result in a graphical message dialog.

• Main.java: Core logic for input handling, Leibniz series calculation, and result display.

Feedback and suggestions are welcome! <3