Question

How to calculate factorial using recursion in Lua

Answer 1

function factorial_recursion(n)
    local function fr_(factorial, n)
        if n < 2 then return factorial end
        return fr_(factorial * n, n - 1)
    end
    return fr_(1,n)
end

print(factorial_recursion(5))




--[[
run:
  
120
  
--]]

 

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Answer 2

function factorial_recursion(n)
    if (n == 0) then
        return 1
    else
        return n * factorial_recursion(n - 1)
    end
end

io.write(factorial_recursion(5), "\n")





--[[
run:
  
120
  
--]]

 

70+ SQL courses for beginners and professionals