Write a Java program to check any Number is Prime or not. || Java Programming Tutorials.
Prime number is a number that is greater than 1 and divided by 1 or itself only.
0 and 1 are not prime numbers. The 2 is the only even prime number because all the other even numbers can be divided by 2.
We are looping from 2 to num/2. It is because a number is not divisible by more than its half.
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