PHP PROGRAM TO CHECK PRIME NUMBER OR NOT - STUDENTSBLOG100 PHP TUTORIAL


Logic is same for all programs and only programming statements are different. Here we have given php programming logic to find given number is prime or not.

What is prime Number:
  • A Prime Number can be divided evenly only by 1, or itself. 
  • For example : 5 can only be divided by 1 or 5, so it is a prime number. 
  • But 6 can be divided by 1, 2, 3 and 6 so it is NOT a prime number.
Prime Number Programming Logic:
  • We should do modulo operation for the input number from 1 to input number. ie) 3 % 1 == 0 , 3 % 2 == 1 and 3 % 3 == 0. 
  • Each and every prime number will get two '0' modulo result.
  • So, each time when modulo result occurs 0, increment the count variable, ie) count++
  • After that check the condition that, if count variable == 2, input number is prime else not a prime number
Prime Number PHP program:
Output:
3 is a Prime number

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karthik anu
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7 March 2017 at 12:33 ×

Nice it seems to be good post... It will get readers engagement on the article since readres engagement plays an vital role in every blog.. i am expecting more updated posts from your hands.
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