Can somebody help me to understand this code line by line?

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
int i, j;
for (i=2; i<100; i++)
{
for (j=2; j <= (i/j); j++)
if ((i % j) == 0) break;
if (j > (i/j))
Console.WriteLine("{0} is prime", i);
}
}
}
}

Answer 1

@Fuyuka C#

Answer 2

using (thingy things); //Use some modules to make the code work

namespace Sololearn { //make a namespace
class Program { //Make a class called program

static void main(String[] args) { //Main function, entry point if the code
int i, j; //Declare an empty integer i and j
for(i = 2; i < 100; i++) //integer i is now has the value 2 and it iterates 98 times.
{
for(j = 2; j <= (i/j); j++) //j has the value of 2 j is smaller or equal than i divided by j.
if((i % 2) == 0) break; //Stop the loop if you divide i by 2 and the remainder is 0
if(j > (i/j)) //If j is larger than i divided by j...
Console.WriteLine("{0} is prime", i);
//Print the value of i and "is prime"

}
}
}

Hope this helps, Good luck, and happy coding

Answer 3

What language is this ?

Answer 4

@Kev Just remember Operator Precedence
If doing Math expressions in loop or conditional try adding parentheses

Answer 5

well first for is obvious it counts from 2 to 100 in order to print primes between.
And about the second for as it says until j<=i/j(which means until j^2 <= i) check if i is divisible by j so if its true it means our number is not prime since it is divisble by a number other than itself and 1.
and the reason for j^2 <= i is that for it is not needed to check all numbers till i-1 since if the number is not prime it can devided by a number which is <= sqare(i).

Answer 6

ahh ok ty all
i had some Problems with if (j=2; j <=(i/j); j++)