Porblem print wave column wise

#1

import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner cin = new Scanner(System.in);
int m = cin.nextInt(), n = cin.nextInt(), arr[][] = new int[m][n];
for(int i = 0;i<=m-1;i++){
for(int j =0;j<=n-1;j++){
arr[i][j] = cin.nextInt();
}
}
for(int j = 0;j<=n-1;j++){
if(j%2 == 0){
for(int i = 0;i<=n-1;i++){
System.out.print(arr[i][j]+", “);
}
}else{
for(int i = n-1;i>=0;i–){
System.out.print(arr[i][j]+”, ");
}
}

	}
	System.out.print("END");
}

}======what’s the error

#2

hi @AbhishekAhlawat1102
you have to use m here instead of n
if(j%2 == 0){
for(int i = 0;i<=n-1;i++){
System.out.print(arr[i][j]+", “);
}
}else{
for(int i = n-1;i>=0;i–){
System.out.print(arr[i][j]+”, ");
}

#3

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