Syntax

<data type>[ ][ ] <array name>=new int [ <parents>][ ];

Where

<data type>  Types of array such as int, float, string etc.

<array name> represents name of the array.

new is a keyword which is used to allocate memory to array.

[<parennt>][ ]  how many parents we want to create such as 2 ,3 ,5 etc;

Example for declaring parents

• string  [ ][ ] family=new string[3][ ]; //A Jagged array named family with 3 parents is declared.

Syntax for creating child

<array name>[<parent index>]=new <data type>[<child>];

Where

<array name> represents the name of the array.

<parent index> represents index of the parent which child have been created.

new is a keyword which is used to allocate the memory for child array.

<child> represents number of child needs to be created for parents

Example for creating child array

•       family[0]=new string[4]; //0th index parent had allocated 4 child.
•      amily[1]=new string[2]; //1st index parent had allocated 2 child.

Syntax for assigning values in Jagged Array

<array name>[<parent index>][<child index>]=<value>

Where <array name> represents name of the array in which value needs to be allocated.      

<parent index> represents index of the parent.                                                                    

<child index> represents the index of the array                                                                                                                              

<value> represents the value that needs to be stored in Jagged array.

Example for storing values in Jagged array

·      family[1][1]=45; //45 is stored in Jagged array at 2^nd parent of 1^st child.

·     family[0][2]=33;//33 is stored in jagged array at 1^st parent of 3^rd child.

Using loops for inserting/traversing in Jagged array

Example 1:Inserting of jagged array by using loops

void JaggedArray()
         {
            int[][] num =  newint[3][];//A Jagged array of name num is created which have 3 parents.
            num[0] = newint[2];//0 index of parent have allocated 2 chileds.
            num[1] = newint[3];//i index of parent have allocated 3 chiled
            num[2] = newint[5];//2 index of parent allocated 5 chiled
  
            //Storing values in the ragged array
            for (int i = 0; i < num.Length; i++)//outer loop which iterates parent
            {
                for (int j = 0; j < num[i].Length; j++)//inner loop which iterates chiled
                {
                    Console.Write("Enter Values in Ragged Array---> ");//Displaying a message to the console device
                    num[i][j] = Convert.ToInt32(Console.ReadLine());//Storing values in Jagged array
                }
            }
        }

Example 2:Traversing of jagged array by using loops

void traverseArray(int[][] num)
         {
            for (int i = 0; i < num.Length; i++)//outer loop for iterating parents
            {
                for (int j = 0; j < num[i].Length; j++)//Inner loop for iterating chileds
                {
                    Console.WriteLine("Values : {0}", num[i][j]);//displaying values of Jagged Array
                }
            }
        }