Lua Programming Examples

Function with Variable Argument

lua

function average(...)
   result = 0
   local arg = {...}
   for i,v in ipairs(arg) do
      result = result + v
   end
   return result/#arg
end

print("The average is",average(10,5,3,4,5,6))

Assigning and Passing Functions

lua

myprint = function(param)
   print("This is my print function -   ##",param,"##")
end

function add(num1,num2,functionPrint)
   result = num1 + num2
   functionPrint(result)
end

myprint(10)
add(2,5,myprint)

Calling Function

lua

function max(num1, num2)

   if (num1 > num2) then
      result = num1;
   else
      result = num2;
   end

   return result; 
end

-- calling a function
print("The maximum of the two numbers is ",max(10,4))
print("The maximum of the two numbers is ",max(5,6))

Lua nested if Statement

lua

--[ local variable definition --]
a = 100;
b = 200;

--[ check the boolean condition --]

if( a == 100 )
then
   --[ if condition is true then check the following --]
   if( b == 200 )
   then
      --[ if condition is true then print the following --]
      print("Value of a is 100 and b is 200" );
   end
end

print("Exact value of a is :", a );
print("Exact value of b is :", b );

if else Statement in Lua

lua

--[ local variable definition --]
a = 100;

--[ check the boolean condition --]

if( a < 20 )
then
   --[ if condition is true then print the following --]
   print("a is less than 20" )
else
   --[ if condition is false then print the following --]
   print("a is not less than 20" )
end

print("value of a is :", a)

if Statement in Lua

lua

--[ local variable definition --]
a = 10;

--[ check the boolean condition using if statement --]

if( a < 20 )
then
   --[ if condition is true then print the following --]
   print("a is less than 20" );
end

print("value of a is :", a);

break Statement in Lua

lua

--[ local variable definition --]
a = 10

--[ while loop execution --]
while( a < 20 )
do
   print("value of a:", a)
   a=a+1
	
   if( a > 15)
   then
      --[ terminate the loop using break statement --]
      break
   end
	
end

nested Loop in Lua

lua

j = 2
for i = 2,10 do
   for j = 2,(i/j) , 2 do
	
      if(not(i%j)) 
      then
         break 
      end
		
      if(j > (i/j))then
         print("Value of i is",i)
      end
		
   end
end

repeat until Loop in Lua

lua

--[ local variable definition --]
a = 10

--[ repeat loop execution --]
repeat
   print("value of a:", a)
   a = a + 1
until( a > 15 )

For Loop in Lua

lua

for i = 10,1,-1 
do 
   print(i) 
end

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