PrimeCount

local Prime = 1
local i
local count
local primeCount
local num = 1

side = "right"
term.redirect(peripheral.wrap(side))

print("Welcome to my prime counting program. This program will display all numbers between 1 and the user defined number, making a note next to all prime numbers. Enter a value less than or equal to 0 to quit.")

while num > 0 do

    print("")
    print("Please input your number: ")
    num = read()

    primeCount = 0

    for count=1,num,1 do

        Prime = 1

        if count == 1 then

            Prime = 0

        end

        if(count ~= 2 and Prime == 1)then

            if(math.fmod(count,2) == 0)then

                Prime = 0

            end

            for i=3,count,2 do

                if(math.fmod(count,i) == 0)then

                    Prime = 0

                end

            end

        end

        if Prime == 1 then

            primeCount = primeCount + 1
            print(count .. " ---- " .. primeCount .. "th Prime")

        else

            print(count)

        end

        if count == num then

            print("")
            print("There are" .. primeCount .. " prime numbers between 1 and " .. num)

        end

    end

end