-- Shows literals and named and based numbers
-- Literals are values that are represented directly in a program
 
with ada.text_io; use ada.text_io; 
procedure consts_lits  is 
    -- TYPED CONSTANT
    light: constant Integer := 299_792_458;   -- meters per second

    -- NAMED NUMBERS
    pi: constant := 3.141_593_589_793_238_462_643_383_279_502;
    one_third: constant := 1 / 3;    -- Really is 1 / 3
    one: constant := one_third * 3;  -- Really is one

    -- Some randomly chosen BASED NUMBERS
    bin: Natural := 2#1010_0001#;
    oct: Natural := 8#1234_5670#;
    hex: Natural := 16#1A3C_5F70#;

    -- NUMERIC LITERALS are above
    -- OTHER literals
    c: Character := 'a';

    s: String := "ABC";
    t: String := "A""C";  -- String A"C

    b: Boolean := false;

    -- ENUMERATED TYPES provide NEW LITERALS 
    type Days is (Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday);
    d: Days := Friday;

begin
    put_line("c is " & c);
    put_line("s and t are " & s & t);
    put_line("b is " & b'img);
    put_line("Today is " & d'img);
    
end consts_lits;