java while and for loops dilemma -

i m working on example , cannot seem figure doing wrong.

public class nestedloop {     public static void main(string[] args) {         int usernum = 0;         int = 0;         int j = 0;          while (j <= usernum) {             system.out.println(j);             ++j;             (i = j; <= usernum; ++i) {                 system.out.print(" ");             }         }         return;     } } 

the result below. can see result backward , not sure doing wrong. have tried change variables around , not getting where. appreciate.

expected output: 0  1   2    3 output: 0    1   2  3 

thanks

you using usernum increment wrong , increment j++ after spaces return. can remove return statement.

corrected code:

public class nestedloop {     public static void main(string[] args) {         int usernum = 3;         int = 0;         int j = 0;          while (j <= usernum) {             system.out.println(j);             (i = 0 ; <= j; ++i) {                 system.out.print(" ");             }             ++j;         }     } }