Lua Programming Examples

Lua Multi-Dimensional Array Program

lua

-- Initializing the array
array = {}

for i=1,3 do
   array[i] = {}
	
   for j=1,3 do
      array[i][j] = i*j
   end
	
end

-- Accessing the array

for i=1,3 do

   for j=1,3 do
      print(array[i][j])
   end
	
end

Array using for loop

lua

array = {}

for i= -2, 2 do
   array[i] = i *2
end

for i = -2,2 do
   print(array[i])
end

Lua One-Dimensional Array Program

lua

array = {"Lua", "Tutorial"}

for i = 0, 2 do
   print(array[i])
end

Other Common Functions

lua

string1 = "Lua"
string2 = "Tutorial"

-- String Concatenations using ..
print("Concatenated string",string1..string2)

-- Length of string
print("Length of string1 is ",string.len(string1))

-- Repeating strings
repeatedString = string.rep(string1,3)
print(repeatedString)

Character and Byte Representations

lua

-- Byte conversion

-- First character
print(string.byte("Lua"))

-- Third character
print(string.byte("Lua",3))

-- first character from last
print(string.byte("Lua",-1))

-- Second character
print(string.byte("Lua",2))

-- Second character from last
print(string.byte("Lua",-2))

-- Internal Numeric ASCII Conversion
print(string.char(97))

Formatting Strings

lua

string1 = "Lua"
string2 = "Tutorial"

number1 = 10
number2 = 20

-- Basic string formatting
print(string.format("Basic formatting %s %s",string1,string2))

-- Date formatting
date = 2; month = 1; year = 2014
print(string.format("Date formatting %02d/%02d/%03d", date, month, year))

-- Decimal formatting
print(string.format("%.4f",1/3))

Finding Reversing

lua

string = "Lua Tutorial"

-- replacing strings
print(string.find(string,"Tutorial"))
reversedString = string.reverse(string)
print("The new string is",reversedString)

Replacing Substring

lua

string = "Lua Tutorial"

-- replacing strings
newstring = string.gsub(string,"Tutorial","Language")
print("The new string is "..newstring)

Case Manipulation

lua

string1 = "Lua";

print(string.upper(string1))
print(string.lower(string1))

String Forms

lua

string1 = "Lua"
print("\"String 1 is\"",string1)

string2 = 'Tutorial'
print("String 2 is",string2)

string3 = [["Lua Tutorial"]]
print("String 3 is",string3)

Follow

Newsletter