Learning how to write a prime number program in Java is an important milestone for beginners and a common coding interview question. A prime number is a natural number greater than 1 that has no divisors other than 1 and itself. With Java’s control structures and loops, you can efficiently check whether a number is prime.

This guide explains the logic behind prime numbers, breaks it into simple steps, and provides clean Java code for implementation. By practicing this example, you’ll not only understand how conditions and loops work but also gain confidence in solving algorithmic challenges.