what is prime no. and how to write in c language?

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provide code also

Posted 29-Jan-14 23:01pm

Shrikant09

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Kornfeld Eliyahu Peter 30-Jan-14 5:05am

Have you done anything so far? Show some effort (coding? searching?)! As is i ain't a question...

thatraja 30-Jan-14 5:05am

We don't spoil student's eduction by giving them code. Besides we don't have any readymade-code.

4 solutions

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TrushnaK · Answer 1 · 2014-01-29T23:45:00

Solution 4

try google like ^[^]

Posted 29-Jan-14 23:45pm

TrushnaK

Karthik_Mahalingam · Answer 2 · 2014-01-29T23:07:00

Solution 1

check these

What is Prime Number [^]

http://www.cquestions.com/2012/02/check-given-number-is-prime-number-or.html[^]
http://www.programiz.com/c-programming/examples/prime-number[^]
http://www.programmingsimplified.com/c/source-code/c-program-for-prime-number[^]

Posted 29-Jan-14 23:07pm

Karthik_Mahalingam

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thatraja 30-Jan-14 5:09am

Please don't answer these questions, atleast not this way(giving code). No vote from me. :|

Karthik_Mahalingam 30-Jan-14 5:26am

No Thatraja,
Instead of copy pasting some lines of code from other sites, they can simply refer that site no...
even they will go more information from those links.
i am sorry, if anything wrong...

thatraja 30-Jan-14 5:48am

No, I said don't give them code(either links or inline-code). Some members're students. You're not supposed to do their homework. They should come with their effort. If not, you should ask to post code(what they have tried) in question. Then we could help them.

Karthik_Mahalingam 30-Jan-14 6:05am

ok fine. Thanks.

Aravindba · Answer 3 · 2014-01-29T23:08:00

Hai
just google it u can get

C++

int main() { 
 int n, i; 
 scanf("%d", &n); 
 for (i = 2; i<n/2; i++) if (n % i == 0) { printf("Not prime"); return 0; } 
 printf("Prime"); 
 return 0; 


}

A Prime Number can be divided evenly only by 1, or itself.
And it must be a whole number greater than 1.

Example: 5 can only be divided evenly by 1 or 5, so it is a prime number.

But 6 can be divided evenly by 1, 2, 3 and 6 so it is NOT a prime number (it is a composite number).

pls check this link http://www.mathsisfun.com/definitions/prime-number.html[^]

Abhinav S · Answer 4 · 2014-01-29T23:09:00

Solution 3

Here you go - http://en.wikipedia.org/wiki/Prime_number[^].
Try implementing the program on your own.

Hint: Here is the algorithm - http://en.wikibooks.org/wiki/Efficient_Prime_Number_Generating_Algorithms[^].

Posted 29-Jan-14 23:09pm

Abhinav S