Code 04 - Array Intro

-- Code 04 - Table Intro
-- Can be copied into Codea
-- Bruce Elliott
-- April 2013

-- Use this function to perform your initial setup

function setup()
-- Create a table named kTab the name is not important
-- use a name that helps document your code
--
-- in Codea each table entry consists of two parts.
-- Here the first part are the numbers 1 to 15.
--
-- The second part of each entry is text. Here a single character.

    kTab={}
    kTab[1] = "1"
    kTab[2] = "2"
    kTab[3] = "3"
    kTab[4] = "4"
    kTab[5] = "5"
    kTab[6] = "6"
    kTab[7] = "7"
    kTab[8] = "8"
    kTab[9] = "9"
    kTab[10] = "0"
    kTab[11] = "+"
    kTab[12] = "-"
    kTab[13] = "*"
    kTab[14] = "/"
    kTab[15] = "="

-- Display the table entries
-- A for loop steps through a sequence of values
--
-- We are using pairs to access the table keys and values
-- for each key (k) we want to get its value (v)
-- We have to tell pairs which table to process
--
-- We display each key followed by its value
-- Note: .. is used to concatenate (attach)
-- parts of the output string

    for k, v in pairs(kTab) do
        print(k.." "..v)
    end

-- Here we use print to display the value
-- with key 12.

    print("val: "..kTab[12])
end