How does inverse function work and how to use it?

I would like how to know how inverse can be used

Could I use it like this?

local i = 0
function Example()
	if i > 1 then
		i = i:inverse
	end
	print(i)
end

Example()

"Inverse" is a term from mathematics that has two meanings:

The inverse function of a function "undoes" that function. i.e., if F is the inverse of f, then F(f(x)) should be the same as x. Examples:

*x^2 is the inverse of math.sqrt(x)

• math.acos the inverse of math.cos
• math.sin the inverse of math.asin.

Not all functions are invertible (meaning some functions don't have inverses)

The identity of an operation is the[^1] value that "does nothing" to other values:

• The identity of + (for numbers) is 0 since x + 0 is x
• The identity of * (for numbers) is 1 since x * 1 is x
• The identity of * (for CFrames) is CFrame.new(0, 0, 0) since x * CFrame.new() is x
• The identity of + (for Vector3s) is Vector3.new(0, 0, 0) since x + Vector3.new() is x

The inverse of a value x with respect to an operation is the value y that "cancels" with x yielding the identity of that operation.

Not all values have inverses.

• the inverse of x with respect to + (for numbers) is -x since x + -x is 0, the additive identity
• the inverse of x with respect to * (for numbers) is 1/x or x^-1 since x * 1/x is 1, the multiplicative identity. 0 does not have a multiplicative inverse
• the inverse of x with respect to + (for Vector3s) is -x since x + -x is Vector3.new(0, 0, 0), the additive identity
• the inverse of x with respect to * (for CFrames) is x:inverse() since x * x:inverse() is CFrame.new(), the multiplicative identity of CFrames

[^1]: identities are unique

As i read in the comments, the thing you want is:

Value = -Value

Your question is about :inverse, wich is a method that can be called on CFrames.

As tested in roblox studio:

v = 2 print(-v), prints -2

v = -2 print(-v), prints 2