GrabCount = 0
function onGrab()
    GrabCount = GrabCount + 1
    
    --You can print without converting type.
    print(GrabCount)
    
    --Concatenation of string and number types
    print("Grab: "..GrabCount)
    
    --If an integer is assigned, it is a number type
    print("GrabCount is "..type(GrabCount).." type")
    
    -- Even if you run a computation with decimal, it will remain as a number type
    local num = GrabCount * 3.14159265
    print(num)
    print("num is "..type(num).." type")

    --Declare as a string
    local char = "1234"
    print("char is "..type(char).." type")

    --Type conversion from string to number
    local conversion = tonumber(char)
    print("conversion is "..type(conversion).." type")
end