--[[
  _____ ___ __  __ _____ 
 |_   _|_ _|  \/  | ____|
   | |  | || |\/| |  _|  
   | |  | || |  | | |___ 
   |_| |___|_|  |_|_____|

Just run the script and it will output both CEST and local timezones in both 24- and 12-hour formats.
You can wrap the code in a loop to output the current time live.

--]]

-- CEST time

local timezone = 1 -- timezone offset (ISO 8601 format)

local date = os.date("!*t")
local hour = (date.hour + timezone) % 24 -- make sure the hour resets back to 1 after passing 24

local timestamp = string.format("%02i:%02i", hour, date.min) -- the formatted timestamp (HH:MM)

print(timestamp)

-- local time

local lTimezone = os.date("%z")
local lOffset = lTimezone:sub(2, 3) + 1 -- adds 1 because as of the time this script was written, the time was 15:53 and this outputted 1 hour early
local lHour = (date.hour + lOffset) % 24

local lTimestamp = string.format("%02i:%02i", lHour, date.min)
print(lTimestamp)

-- 12-hour clock

local ampm = hour < 12 and "AM" or "PM"

local timestamp12 = string.format("%02i:%02i %s", ((hour - 1) % 12) + 1, date.min, ampm)
print(timestamp12)

-- 12-hour clock (local)

local ltimestamp12 = string.format("%02i:%02i %s", ((lHour - 1) % 12) + 1, date.min, ampm)
print(ltimestamp12)
by

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Taking inputs (stdin)

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name = io.read("*a")
print ("Hello ", name)

About Lua

Lua is a light weight embeddable scripting language which is built on top of C. It is used in almost all kind of applications like games, web applications, mobile applications, image processing etc. It's a very powerful, fast, easy to learn, open-source scripting language.

Syntax help

Variables

  • By default all the variables declared are global variables
  • If the variables are explicitly mentioned as local then they are local variables.
  • Lua is a dynamically typed language and hence only the values will have types not the variables.

Examples

-- global variables
a = 10

-- local variables

local x = 30
Value TypeDescription
numberRepresents numbers
stringRepresents text
nilDifferentiates values whether it has data or not
booleanValue can be either true or false
functionRepresents a sub-routine
userdataRepresents arbitary C data
threadRepresents independent threads of execution.
tableCan hold any value except nil

Loops

1. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition)
do
--code
end

2. Repeat-Until:

Repeat-Until is also used to iterate a set of statements based on a condition. It is very similar to Do-While, it is mostly used when you need to execute the statements atleast once.

repeat
   --code
until( condition )

3. For:

For loop is used to iterate a set of statements based on a condition.

for init,max/min value, increment
do
   --code
end

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increase re-usuability and modularity.

optional_function_scope function function_name( argument1, argument2, argument3........, argumentn)
--code
return params with comma seperated
end