In Lua 5.2 or earlier, both tostring(10)
and tostring(10.0)
result as the string "10"
.
In Lua 5.3, this has changed:
print(tostring(10)) -- "10" print(tostring(10.0)) -- "10.0"
That’s because Lua 5.3 introduced the integer subtype. From Changes in the Language:
The conversion of a float to a string now adds a
.0
suffix to the result if it looks like an integer. (For instance, the float2.0
will be printed as2.0
, not as2
.) You should always use an explicit format when you need a specific format for numbers.
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