Lua check if variable's type is float

Question

How to check if type of a variable is float? Float isn't basic type of values in Lua, so function type() return only number.

If i remember correctly, all numbers are floating point in Lua. Integers are only floating point numbers without the decimals. — Some programmer dude
– Some programmer dude, Commented Aug 3, 2012 at 11:38

Sergey Kalinichenko · Accepted Answer · 2012-08-03 11:47:35Z

6

All numbers in Lua are floating point¹. You can tell is a number represents a number with non-zero fractional part by using math.modf.

¹ Unless lua's code itself is compiled with a flag that instructs it to use integers instead of floating-point numbers, in which case you cannot use floating point numbers in your programs at all.

answered Aug 3, 2012 at 11:47

Sergey Kalinichenko

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daurnimator Over a year ago

You can also check if a number has a fractional part with n%1 == 0

TheVisgou · Accepted Answer · 2017-08-28 15:49:29Z

4

math.type() tells you if the number is a float or an integer. It's only available on Lua 5.3

See the Lua 5.3 Reference Manual of math functions https://www.lua.org/manual/5.3/manual.html#6.7

answered Aug 28, 2017 at 15:49

TheVisgou

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idbrii Over a year ago

However, print(math.type(0.5 + 0.5)) prints "float" -- it's giving you the storage type which may not be what you want.

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