How to judge Infinity ?

[yukinohana]

I don't know how to judge when the value of the field is Infinity.

Is isFinite cannot be used ?

If not, how can I determine it?

[yukinohana · Accepted solution]

Sorry ! It's my other mistake. 

isFinite is available.

I want to erase this question but I don't know how to use this site.

[try67]

My guess is you're dividing by zero.

[yukinohana]

yes... sorry.

[try67 · Accepted solution]

That is what causing your result to be "Infinity", as it's an illegal operation.