UNIT 5 - 2D Arrays

how to initialize a 2D array

dataType [][] varName = new dataType[row][column] (size of the array)

{{2,3,4}, {3, 4, 5}} to initialize to values

how to access a row in a 2D array?

array name and index number in bracket

how to access a value in a 2D array

name[][]

row-major traversal

(moving left to right and then down)

(row.length {

col[0]. length}}

what does array.length represent?

the NUMBER of rows in an array

what does array[0].length mean?

the number of elements in a row (the number of colums)

column major traversal

reading each column (top to bottom) then shifting right

what is the indexOf(String ch) method?

it tells you the index numbers of the specified string(remeber every string is an array with the characters starting at index 0