NareshCSE developed an Electricity Bill Calculator for the NareshCSE/Java24CSEC repository, focusing on accurate bill computation from user-provided meter readings. Using Java, along with basic input/output and control structures, NareshCSE implemented robust input validation and comprehensive error handling to ensure the program could gracefully manage invalid or unexpected data. The feature automated a previously manual billing process, reducing the risk of calculation errors and improving reliability for end users. Delivered within a one-month period, the work demonstrated foundational programming skills and attention to user experience, though it was limited in scope to a single feature without bug fixes.