-- Notation Test from @jozzyonroblox (enter a number for the first two then the notation you want)
-- Program Input Ex. (10, 26, sigma) or (1, 5, pi) make sure you enter a number for the first two
-- Notations: sigma, pi, quad, exp, log, fac

-- Input 1 = Addition/Multiplied Factor (1, 2, 6)
-- Input 2 = The Number of Loops (100, 250, 30)
-- Input 3 = The Function (sigma, quad, exp)

local SigmaNotation = function(n, a)
    local result = n-1
    for i = 0, a + 1 do
        result = result + i
        print(result, "Term: " .. i)
    end
    print("Final result after " .. a .. " Terms: " .. result)
end

local PiNotation = function(n, a)
    local result = n
    for i = 1, a do
        result = result * (2 * i)
        print(result, "Term: " .. i)
    end
    print("Final result after " .. a .. " Terms: " .. result)
end

local QuadraticFunction = function(n, a)
    local result = n
    for i = 1, a do
        result = n * (i ^ 2)
        print(result, "Term: " .. i)
    end
    print("Final result after " .. a .. " Terms: " .. result)
end

local ExponentialFunction = function(n, a)
    local result = n
    for i = 1, a do
        print(result, "Term: " .. i)
        if i >= a then
            break
        end
        result = result * n
    end
    print("Final result after " .. a .. " Terms: " .. result)
end

local LogarithmicFunction = function(n, a)
    local result = n
    for i = 1, a do
        result = math.log10(n * i)
        print(result, "Term: " .. i)
    end
    print("Final result after " .. a .. " Terms: " .. result)
end

local FactorialFunction = function(n, a)
    if n < 1 then return end
    local result = n
    for i = 1, a do
        result = result * i
        print(result, "Term: " .. i)
    end
    print("Final result after " .. a .. " Terms: " .. result)
    return result
end






























































































































































































































































local input = io.read()

if not input then
    return print("You did not enter a notation. Use the (1, 20, pi) (NO PARENTHESIS) as an example.")
end

local num1, num2, notation = input:match("([%-]?[%d%.]+),%s*([%-]?[%d%.]+),%s*(%a+)")
num1 = tonumber(num1)
num2 = tonumber(num2)

if notation == "sigma" then
    SigmaNotation(num1, num2)
elseif notation == "pi" then
    PiNotation(num1, num2)
elseif notation == "quad" then
    QuadraticFunction(num1, num2)
elseif notation == "exp" then
    ExponentialFunction(num1, num2)
elseif notation == "log" then
    LogarithmicFunction(num1, num2)
elseif notation == "fac" then
    FactorialFunction(num1, num2)
else
    print("No valid notation entered. Use the 'sigma', 'pi', 'quad', 'exp', 'log', or 'fac' functions for the output to work.")
end