Isn't printing and I don't know why.

Went back and ran your code with a change. I see what it does now. public static void mult(int a) { for (int i = 1; i <= 10; i++) { System.out.print((a * i) +" " ); } System.out.println(); } public static void main(String[] args) { mult(1); mult(2); mult(3); mult(4); mult(5); mult(6); mult(7); mult(8); mult(9); mult(10); } }

Oh wait. It doesn't say while loop in the instructions. It only says that in the task intro......so a for loop should work also.

for (int i = 1; i <= 10; i++) // The i++ here already increments the i. { System.out.print(a * (i + 1) + " "); //You don't need to increment it again here. (I + 1)....that's incrementing it twice. a* each value. You added a space. Also use println. It goes down a line automatically. You used print which stays on the same line. This would be one way to do the problem except usually the "checker" doesn't let you get away with doing it any other way than the instructions say to do it. (while loop)

Problem says to use a while loop as in Level 2, Lesson 9. That crazy mess that had the fileInput/Output stuff shows a while loop.

I see what you guys are doing and it is a more simple way of doing it, but you could also just use a 2D array with a for loop and achieve the same result. Here's the video on Arrays I used: https://www.youtube.com/watch?v=Yr4V3Tdw6CQ&list=PL_c9BZzLwBRKIMP_xNTJxi9lIgQhE51rF&index=43

Try this one public class Solution { public static void mult(int a) { for (int i = 0; i <= 9; i++) { System.out.print(a * (i + 1) + " "); } System.out.println(" "); } public static void main(String[] args) { mult(1); mult(2); mult(3); mult(4); mult(5); mult(6); mult(7); mult(8); mult(9); mult(10); } }

public class Solution { public static void main(String[] args) { for (int i =1; i<= 10; i++){ for (int j=1; j<=10; j++){ System.out.print(i*j + " "); } System.out.println(); } } }

I don't see any reason why it would not print. I copied and pasted the code into my IDE and it ran fine, other than the output is incorrect. First, and you probably modified this at some point, line 12 should multiply 'a' by 'i' and not 'a' by '(i+1)'. This leads to the first line being 2-11. Second, there are extra spaces (2) at the end of each line. You can get rid of one by changing line 14 to get rid of the space. Just *.println() works. The second space I'll share the technique I use to make sure they don't happen. For lines 11-14:

System.out.print.print(a*1); // start of line
for (int i = 1; i <= 10; i++)
   System.out.print(" "+ (a * i)); // add a space first followed by input for each continued number
System.out.println(); //end line

You can also clean up the main method by using a for loop with the same parameters as line 11's loop that calls mult(i) each cycle.