Write a program in php to print prime numbers between 1 and 100

Print prime numbers from 1 to 100 in PHP using for loop and while loop.

In this article, you will learn how to print prime numbers from 1 to 100 in PHP using for loop and while loop.

Example

------The prime numbers from 1 to 60 are------

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 

You should have the knowledge of the following topics in PHP programming to understand this program:

• PHP For loop
• PHP While loop

Sample of Prime Numbers

2 3 5 7 .......... 47 53 59

In this article, we solve this problem using two methods:

1. Using the for loop
2. Using the while loop

Source Code

Run Program

Output

------The prime numbers from 1 to 60 are------

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 

Explanation

In this given program, we have taken input in the variable $x = 60 to generate the prime numbers up to 60.

Then we applied simple calculation via for loop to check every number of range between 1-60 to find the prime numbers.

If any number is divided by only 1 & itself and which number is divisible by any numbers it means these type numbers are called the prime numbers.

 After the whole calculation, this will return these numbers:  2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59, It's the final output of the above program.

Print Prime Numbers from 1 to 100 in PHP using While loop

Run Program

This blog describes how to find prime numbers between 1 and 100 using PHP. Prime number is a number which is divided by 1 and itself.  Consider the number 5. It is prime number because it can be divided by 1 and 5.

PHP program for prime numbers:

Consider the below program which is used to find prime numbers from 1 to 100.

    for($i = 1; $i <= 100; $i++)
      $mm = 0;
      for($j = 2; $j <= $i/2; $j++) {
        //only not prime numbers
                if ($i % $j == 0) {
                  $mm++;
                  break;
                }
      }
      if ($mm == 0) {
                echo"$i is prime number
";
      }
    }
  ?>

In above program, if a number is divided by any number except 1 and itself, then it is not prime number. Otherwise it is a prime number.

Now you got prime numbers between 1 and 100 using PHP.

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