Java Program to Print matrix in snake pattern
Last Updated :
07 Aug, 2022
Given an n x n matrix .In the given matrix, you have to print the elements of the matrix in the snake pattern.
Examples :
Input :mat[][] = { {10, 20, 30, 40},
{15, 25, 35, 45},
{27, 29, 37, 48},
{32, 33, 39, 50}};
Output : 10 20 30 40 45 35 25 15 27 29
37 48 50 39 33 32
Input :mat[][] = { {1, 2, 3},
{4, 5, 6},
{7, 8, 9}};
Output : 1 2 3 6 5 4 7 8 9
We traverse all rows. For every row, we check if it is even or odd. If even, we print from left to right else print from right to left.
Java
import java.util.*;
class GFG
{
static void print(int [][] mat)
{
for (int i = 0; i < mat.length; i++)
{
if (i % 2 == 0)
{
for (int j = 0; j < mat[0].length; j++)
System.out.print(mat[i][j] +" ");
}
else
{
for (int j = mat[0].length - 1; j >= 0; j--)
System.out.print(mat[i][j] +" ");
}
}
}
public static void main(String[] args)
{
int mat[][] = new int[][]
{
{ 10, 20, 30, 40 },
{ 15, 25, 35, 45 },
{ 27, 29, 37, 48 },
{ 32, 33, 39, 50 }
};
print(mat);
}
}
|
Output :
10 20 30 40 45 35 25 15 27 29 37 48 50 39 33 32
Time complexity: O(n^2) where n is no of elements in rows and columns
Auxiliary Space: O(1) because constant space has been used
Please refer complete article on Print matrix in snake pattern for more details!
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