suppose
var="world"
I want to call a method called hello_world() using the variable var. How
to do that in ruby?
and what feature of programing is this called?suppose
var="world"
I want to call a method called hello_world() using the variable var. How
to do that in ruby?
and what feature of programing is this called?

to be clear:
I want something like calling the method like :
hello_+$var+()

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