function add( a, b )

        return a + b

end

-- print( add( 10, 20 ) )

function loopT( T )

        for i, v in ipairs( T ) do

                print( i, v )

        end

end

-- loopT{ 10, 20, 30, 40, 50, 100 }

function show( str )

        print( str )

end

--show "hello baby"

-- get sum of 1.....100

function calc( start_num, end_num  )

        local sum =

        for i = start_num, end_num do

                sum = sum + i

        end

        return sum

end

--print( calc( 1, 100 ) )

function calc2( start_num, end_num )

        local sum =

        local i = start_num

        while i <= end_num do

                sum = sum + i

                i = i +

        end

        return sum

end

-- print( calc2( 1, 100 ) )

function calc3( start_num, end_num )

        local sum =

        local i = start_num

        while true do

                sum = sum + i

                i = i +

                if i > end_num then break end

        end

        return sum

end

-- print( calc3( 1, 100 ) )

function calc4( start_num, end_num )

        local sum =

        local i = start_num

        repeat

                sum  = sum + i

                i = i +

        until i > end_num

        return sum

end

-- print( calc4( 1, 100 ) )

function calc5( start_num, end_num )

        local T = {}

        for i = start_num, end_num do

                T[i] = i

        end

        local sum =

        for i, v in ipairs( T ) do

                sum = sum + v

        end

        return sum

end

-- print( calc5( 1, 100 ) )