How can I control this Constant in Blueprint?

Development Programming & Scripting
1

How can I control this Constant in Blueprint?
step by step…
I want to control constant step by step. If I press “M” I want particle constant 50, and If I press again I will go up to 100 … and so on. And I want to control other ways too, if I press “N” I want constant to go down. Opposite as pressing “M”. Please help me …
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2

Select “Distribution Float Particle Parameter” instead, and you’ll be able to access it by its name.

Constants are constants, you can’t change them at runtime.