Why is my Lerp node showing an abnormal value?

Hello.

I think I got a bug, I was trying to trace the movement of the camera so that when I look right the value I would get would be 250 and looking left -250, so I set up this part of the blueprint :

I really get a value from 0 when the Alpha is 0 and -50 000 when Alpha is 100 it’s really weird

Thank you

Alpha should be in the range 0.0 to 1.0 (1.0 means 100% B).

It should also be noted that Alpha can be larger than 1.0, in which case Lerp will extrapolate B. You can use a Clamp node to clamp it into the range 0.0 ~ 1.0.