Note: Ctrl+T in the PDE helps in making code more readable...

That's already a good start. Although you print prime numbers up to 50, not the 50 first one.
You can replace the first loop with a while loop, testing how many numbers were produced so far (so you need a counter, and to manage i manually inside the while loop).
For formatting results, you have to use a conditional to test how many numbers were printed so far on one line. % on the prime counter is useful here too.
Also note the difference between print and println.

I'm still stuck this is my updated code.

try follow phi.lho's advice

For formatting results, you have to use a conditional to test how many numbers were printed so far on one line. % on the prime counter is useful here too.
Also note the difference between print and println.

so insert in your Code

1.   if (i == j) {
2.     //Prints Values
3.     print(i + ", ");
4.    
5.     numberPerLinesCounter++;
6.     if (numberPerLinesCounter > 5) {
7.        // New Line
   
8.        println();
9.        numberPerLinesCounter = 0;
10.     }
11.   }