Pascal is an imperative and procedural programming language, which Niklaus Wirth in 1970. It was described as a small, efficient language intended to encourage good programming practices using structured programming.
Pascal was modified from original version into Object Pascal and Delphi. Delphi is derived from Turbo Pascal a language created by Borland company. Now Delphi is maintained by Embarcadero company and is very expensive.
This is a nice tutorial for beginners that you may like: