I am handling many variable in my application, I dont want to define the string each and every time. Instead of that I want to access the string from one file and access through all the files in my application.
Eg:
one = 1;
I want to access 1 with the variable name one in my application, because in future it can be changed as one (one = one) that time I cant change in all the place.
In order to avoid such difficulty am going for the constant file.