Statement
As command to deal with minimum unit, a statement can't have more than 245 characters.
If a statement have more than 245 characters, there will be wrong. And program will suspend.
Statement has following three types.
Executable statement that make a descriptive record of command treatment and function description.
Unexecutable statement that make a descriptive record of annotion and so on that not deal with.
Label that define branch target of program.