what is the difference between extern double and extern int?

 

Hello guys,

please i would like to know the difference between extern double and extern int, how and when to use each of them.

Also, i want to know if in mql4 language, if 20.0 is different from 20, if yes, what is the difference?

any helpful response will be appreciated. thanks in advance

 

double int

i strongly recommend u to start here

Reason: