Page 64 - Computer Genius Class 07
P. 64

Step 3    Modify the ‘on start’ block as shown below.
















                  Well done, you have learnt to implement return function.
                                                                                       Information Literacy
                         Quest                                                         Media Literacy



                         Answer the following questions:
                         1.  What is the main purpose of using functions?


                         2.  What does function returns when an operation is performed inside
                             a function?






                  An array is an arrangement of objects. Have you seen an egg box? In an egg box, the eggs are
                  arranged in a rectangular fashion. This is an array.
                  What are Arrays?

                  An array is a collection o  similar data type  aria les. Arrays do not support different data types. For
                  example, you can make an array of Integers and another array of Strings, but cannot make an Array
                  having Integer and Strings in the same Collection.
                  Books in  a  library,  is an  example  of arrays  where  all  the  shelves have  a  common  data  type
                  (read – book) in it.
                  Advantage of the array is that it improves the readability of code by using a single variable for a
                  large set of data. But there are limitations of array also, which are:
                     You can only store variables with the same data types in an array
                     The variables in an Array are always ordered sequentially with the index starting  from 0.
                     Arrays are al ays static and fi ed in length and si e.

                  Array Declaration
                  Declaration of array with variables of integer data type is:
                  arr=[10, 20, 30, 40, 50, 60];

                          10        20       30        40       50        60


                          0         1        2         3        4         5                   Array Indices
                  Array Length=6, First index=0, Last index=5


                       62    Computer Genius-VII
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