Hello,

before java 8 if we want to find that a number is prime or not, definitely we have to go through loop given example below

private static boolean isPrime(int number) {

if(number < 2) return false;

for(int i=2; i<number; i++){

if(number % i == 0) return false;

}

return true;

}

but after java 8 it is as simple as

private static boolean isPrime(int number) {

return number > 1

&&** IntStream.range(2, number)**.noneMatch(

index -> number % index == 0);

}

IntStream range method go through the range and it and it’s noneMatch method takes a **Predicate ** and returns true if our condition is satisfied