Last updated on November 20, 2017
In this tutorial, you will learn what is a prime number and how to check whether the given number is a prime number or not using PHP.
What is Prime Number?
A prime number is a natural number which is exactly two positive divisors, 1 and itself. For example, take number 13, its a prime number because it has only two positive divisors.
How to Check Prime Number with PHP?
Below is the simple PHP program to find a given number is prime or not using for loop and if..else control structure.
Output
This is a Prime Number.
Output
This is a Prime Number.