Eval library.

1. What is Eval library ?

Eval library is set of components for runtime evaluation of string. For example you can use this library for creation some calculators etc. In your program code you can have for example variable s:string, and fill this variable using some user interface window. Than set property Expression with some string, and result value is in property Value;
For example s:='2*3+5'; Eval.Expression:=s; and reading property Value gets 11.

2. How many functions supports Eval library ?

Eval library supports:

• basic functions (+,-,*,/) :25
• string functions :40
• date functions : 24
• file functions: 18
• numeric : 30
• goniometric : 23
• conversion : 21
• misc. : 5
• financial :11

For details please look Eval library or function list here.