A array which has got different number of elements in each row is calle as **“Jagged “** Array. It is similar to normal 2D array but the only diference is number of elements in each row

**Example for Normal Array **

int[][] array1= {{1,2,3},{5,3,7},{7,5,4}}

Here we can see array1 is an example for **Normal array **as each row contains same number of elements or coloumns

first row contains 3 elements

second row constains 3 elements

third row contains 3 elements

Overall we say it’s a normal 2D array as all rows contain same number of elements

**JAVA Code for NORMAL Array **

package arrayproblems; class Problem24 { public static void main(String[] args) { int[][] array2= {{1,2},{3,4}}; // normal 2D array // iterating through elements of array for(int i=0;i<array2.length;i++) { for(int j=0;j<array2.length;j++) { System.out.print(array2[i][j]+" "); } System.out.println(); } } }

In above code we can observe that the array2 contains 2 row’s, each row contains 2 elements. so we are using two for loops to iterate through elements of array

**Example for Jagged Array **

int[][] array2={{1,2},{2,3,4},{5,7,3,2,1}}

In array2 we can see that first row contains only 2 elements ,

second row contains 3 elements

third row constains 5 elements

Overall we can observe that each row is having diferent number of elements or coloumns so it is an example for “Jagged array”.

**JAVA Code for JAGGED ARRAY **

package arrayproblems; class Problem24 { public static void main(String[] args) { int[][] array2= {{1,2,3},{2,2},{1,1,1,1,1},{4,8,2,2,2,3,2,3,2}};// jagged array 2D for(int i=0;i<array2.length;i++) { for(int j=0;j<array2[i].length;j++) { System.out.print(array2[i][j]+" "); } System.out.println(); } } }

In above code we can see array2 has 4 rows of different length. first row contains 3 elements, second row contains 2 elements, third row contains 5 elements and fourth row contains 9 elements.

so overall number of elements are different in each row.

so we are using 2 for loops, first one for rows and second one for iterating the elements of each row.

**NOTE**: array2[i].length() will give how many elements are there in ith row

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