Static Double

[SoSublim3]

Hey everyone i'm very very C++ illiterate in one of my classes i have to use a static double what exactly is a static double and what would i use it for. according to my project in my class i'm in right now i have to declare annualInterestrate a static double.

[helios]

It's a double precision floating point number that retains its value between calls to the function. Global variables are static, too.
Static local variables are declared using the static keyword.