from 1 to 100 and print only those which passed the prime test.ītw, if you are looking for some serious programming coding questions for the interview, then you can also take a look at Cracking the coding interview book by Gayle Mcdowell which contains more than 150 coding questions with solutions.Īnd, if you are serious about improving your coding skills and cracking tough coding interviews from FAANG companies like Facebook, Google, Apple, Amazon, etc then you can also checkout Grokking the Coding Interview: Patterns for Coding Questions, an interactive course from Educative.Īn optimized way to generate Prime numbers from 1 to 100And, here is our complete Java program which shows an optimized way to generate prime numbers in the range of 1 to 100. We'll first write a function to check whether a number is prime or not and then we loop through the first 100 numbers i.e. How Many Prime Numbers Are There The Greek mathematician Eratosthenes (3rd-century B.C) designed a quick way to find all the prime numbers up to any given number. You don’t have to memorize them but it would be best if you remember the smaller numbers, such as 2, 3, 5, 7, 11, 13. One of the most popular algorithms for generating prime is Sieve of Eratosthenes, which we have discussed earlier, but in this post, we will take a simpler approach. This is our list of prime numbers from 1 to 100. The key here is that you cannot use a library function which can simplify your job, you need to devise the algorithm for checking prime number by yourself. It's one of the most common coding exercises for programmers learning in Java, as it gives you an opportunity to learn more about the essential operators in Java Programming. Hello guys, today, I'll share with you a simple problem of writing a Java program to print prime numbers up to a given number like saying prime numbers from 1 to 100.
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