Lua Academy · Lesson

The math Library

floor, ceil, random, and more.

Meet the math Library

Lua ships with a built-in math library full of useful functions and constants for working with numbers.

You call its functions with the math. prefix, like math.sqrt(9). No setup or import needed.

print(math.sqrt(9))

math.abs() returns the absolute value of a number, removing any negative sign.

So math.abs(-5) gives 5, and math.abs(5) also gives 5.

print(math.abs(-5))
print(math.abs(3))