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Highlight the prime numbers in given numbers using C#or Asp.Net


1	2
25	203
35	145
56	22
78	45
9	-1


What I have tried:

this is what i have so far: but unfortunately it is the worst code ever.
C#
var prime = function (){
var num;
for (num = 0; num < 101; num++){
    if (num % 2 === 0){
        break;
    }
    else if (num % 3 === 0){
        break;
    }
    else if (num % 4=== 0){
        break;
    }
    else if (num % 5 === 0){
        break;
    }
    else if (num % 6 === 0){
        break;
    }
    else if (num % 7 === 0){
        break;
    }
    else if (num % 8 === 0){
        break;
    }
    else if (num % 9 === 0){
        break;
    }
    else if (num % 10 === 0){
        break;
    }
    else if (num % 11 === 0){
        break;
    }
    else if (num % 12 === 0){
        break;
    }
    else {
        return num;
    }
}
};
console.log(prime());
Posted
Updated 20-Nov-16 17:25pm
v2

1 solution

Quote:
this is what i have so far: but unfortunately it is the worst code ever.
I agree with you, the worst code ever and it don't even work and not even sure it is C#, it look like JS.

Your code can be simplified by removing test for non prime divisors, it will give same results
JavaScript
var prime = function (){
var num;
for (num = 0; num < 101; num++){
    if (num % 2 === 0){
        break;
    }
    else if (num % 3 === 0){
        break;
    }
    else if (num % 5 === 0){
        break;
    }
    else if (num % 7 === 0){
        break;
    }
    else if (num % 11 === 0){
        break;
    }
    else {
        return num;
    }
}
};
console.log(prime());

As I see, this code do not even mach the statement.

We do not do your HomeWork.
HomeWork is not set to test your skills at begging other people to do your work, it is set to make you think and to help your teacher to check your understanding of the courses you have taken and also the problems you have at applying them.
Any failure of you will help your teacher spot your weaknesses and set remedial actions.
So, give it a try, reread your lessons and start working. If you are stuck on a specific problem, show your code and explain this exact problem, we might help.

As programmer, your job is to create algorithms that solve specific problems and you can't rely on someone else to eternally do it for you, so there is a time where you will have to learn how to. And the sooner, the better.
Creating an algorithm is basically finding the maths and make necessary adaptation to fit your actual problem.

Doing some research is also part of your job.
Prime number - Wikipedia[^]
Integer factorization - Wikipedia[^]
 
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