Any program or trick to find the definition of a variable?

Question

Many times when I am watching others code I just want to find where and how a variable is defined. Normally what I do now is look for the type of the variable until I find t

Answer 1

In VIM you can use gd to see local variable declarations or gD to see global variable declarations, if they're defined in the current file. Reference Go_to_definition_using_g

You can also use [i to see the definition without jumping to it, or [I to see all occurrences of the variable in all the included files as well, which will naturally show the definition as well.