--- description: Print Prime Number From 1 to 100 in Java - Here is a Java program to print prime numbers from 1 to 100 (1 to N) with program logic and example. title: Program to Print Prime Number From 1 to 100 in Java --- [Skip to content](#main) ## What is a Prime Number? A **Prime Number** is a number that is only divisible by one or itself. It is a natural number greater than one that is not a product of two smaller natural numbers. For example, 11 is only divisible by one or itself. Other Prime numbers 2, 3, 5, 7, 11, 13, 17, etc. **Note:** 0 and 1 are not prime numbers. 2 is the only even prime number. ## How to Print Prime Numbers Between 1 to 100 Program in Java Below is the Java program to print prime numbers from 1 to 100: **Program Logic:** * The main method of [prime number program in Java](https://www.guru99.com/java-program-check-prime-number.html) contains a loop to check prime numbers between 1 to 100 in Java one by one. * The main method calls the method `CheckPrime` to determine whether a number is prime number in Java or not. * We need to divide an input number, say 17 from values 2 to 17 and check the remainder. If the remainder is 0 number is not prime. * No number is divisible by more than half of itself. So, we need to loop through just numberToCheck/2\. If the input is 17, half is 8.5, and the loop will iterate through values 2 to 8 * If `numberToCheck` is entirely divisible by another number, we return false, and loop is broken. * If `numberToCheck` is prime, we return true. * In the main method for prime numbers 1 to 100 in Java, check isPrime is `TRUE` and add to primeNumbersFound String * Lastly, print prime numbers from 1 to 100 in Java public class primeNumbersFoundber { public static void main(String[] args) { int i; int num = 0; int maxCheck = 100; // maxCheck limit till which you want to find prime numbers boolean isPrime = true; //Empty String String primeNumbersFound = ""; //Start loop 2 to maxCheck for (i = 2; i <= maxCheck; i++) { isPrime = CheckPrime(i); if (isPrime) { primeNumbersFound = primeNumbersFound + i + " "; } } System.out.println("Prime numbers from 1 to " + maxCheck + " are:"); // Print prime numbers from 1 to maxCheck System.out.println(primeNumbersFound); } public static boolean CheckPrime(int numberToCheck) { int remainder; for (int i = 2; i <= numberToCheck / 2; i++) { remainder = numberToCheck % i; //if remainder is 0 than numberToCheckber is not prime and break loop. Else continue loop if (remainder == 0) { return false; } } return true; } } ## Expected Output: The output of the prime number between 1 to 100 in [Java program](https://www.guru99.com/java-tutorial.html) will be: Prime numbers from 1 to 100 are: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 Check our program to Find [Prime Numbers from Any Input Number](https://www.guru99.com/java-program-check-prime-number.html) This code is editable. Click Run to Compile + Execute ![](https://www.guru99.com/Customization/CodeEditorFiles/Common/ajax-loader.gif) #### Summarize this post with: ChatGPT Perplexity Grok Google AI **Stay Updated on AI** **Get Weekly AI Skills, Trends, Actionable Advice.** ##### Sign up for the newsletter Subscribe for Free You have successfully subscribed. 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