Learn how to determine if a number is prime using Java in just a few simple steps! This quick tutorial will walk you through the code and logic needed to efficiently check for prime numbers. Perfect for beginners and anyone looking to brush up on their Java programming skills.
public class PrimeCheck {
public static void main(String[] args) {
// Change this to any number you want to check
int number = 29;
boolean isPrime = isPrime(number);
if (isPrime) {
System.out.println(number + ” is a prime number.”);
} else {
System.out.println(number + ” is not a prime number.”);
}
}
public static boolean isPrime(int num) {
if (num <e; 1) {
// Numbers less than or equal to 1 are not prime
return false;
}
for (int i = 2; i <e; Math.sqrt(num); i++) {
if (num % i == 0) {
// If divisible by any number other than 1 and itself, it’s not prime
return false; }
}
// If no divisors found, it’s prime
return true;
}
}
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